Avoiding Storm Damage – Desert Museum Palo Verde Trees

, , , , , , ,

Exploring the Beauty of the Desert Museum Palo Verde

Lovely flowering Desert Museum Palo Verde Tree

‘Desert Museum’ Palo Verde Trees

The Desert Museum Palo Verde (Parkinsonia ‘Desert Museum’), a beloved tree in arid climates, graces numerous residential, commercial, and community landscapes. Its striking medium-green trunk, feathery foliage, and golden late spring flowers contribute to its widespread popularity. While wind damage can be a concern, proper care and selection can ensure these trees thrive.

Avoiding Storm Damage of the Palo Verde Tree

Fallen ‘Desert Museum’ Palo Verde trees after a monsoon storm

These wonderful trees stand as a captivating addition to arid landscapes. Its medium-green trunk, delicate foliage, and vibrant late-spring blooms make it a cherished choice for many. However, understanding and addressing potential wind damage is crucial for their successful growth.

Understanding Wind Damage Concerns

One common hesitation in planting palo verde trees is their perceived susceptibility to wind damage. However, most issues arise from improper maintenance, unsuitable locations, or the selection of the wrong tree type within the Palo Verde family.

Palo Verde Tree in full yellow bloom

Desert Museum Palo Verde tree in my backyard

Personal Success with Desert Museum Palo Verde

I have three of these Palo Verdes around my house. They range in age from 10 to 20 years old. In all that time, I have not lost a single one. While minor branch breakage occurred at times, these resilient trees quickly recovered, showcasing the hardiness of this species.

So, how can you enjoy the beauty of this tree while lessening the danger of wind damage? As a retired certified arborist, I’m here to tell you that there are definitely things you can do.

5 Strategies for Structurally Healthy ‘Desert Museum’ Palo Verdes Trees

1. Water deeply to a depth of 3 feet.

Deep roots are key to the stability of a tree and also decrease the chance of uplifting roots. Apply water toward the outer reaches of the branches where the roots are concentrated. As a tree grows, its roots move outward, so move your drip emitters or hose as needed.

Be sure to plant in an area where there is adequate area for root growth. Parking lot islands and narrow areas don’t allow enough room for roots to anchor the tree.

A blooming Desert Museum Palo Verde Tree

‘Desert Museum’ palo verde that has grown too rapidly due to excess irrigation

2. Irrigate less frequently to avoid your tree growing too fast.

This is a big cause of wind damage with palo verde trees. It’s important to remember that they are desert trees and don’t need as much water as other plants in the landscape. But, people often overwater their desert trees, which causes them to grow too quickly. This causes the formation of weak wood because they haven’t had the time to grow strong trunks and branches. In the photo above, notice how thin the multiple trunks are.

Established native desert trees, that have been in the ground for at least 3 years, can follow these general guidelines – water 1 to 2X a month in spring/fall, 2 to 3X a month in summer, and monthly in winter. These guidelines are for our current drought situation but can be modified as needed.

Several Palo Verde Trees grouped together

Trees that have been pruned up too high (lion-tailing)

3. Prune your tree correctly.

There are examples of awful pruning. One common one is known as ‘lion-tailing’ which is when trees have been over-pruned so the majority of the tree is devoid of branches except for the very top. This pruning deprives the branches of foliage needed to produce energy for the tree and to increase tree strength. It also increases the amount of overhanging branches toward the top making the tree more likely to fall.

Many landscapers don’t know the right way to prune trees and can inadvertently cause harm to your tree. I highly recommend enlisting the services of a certified arborist to prune your tree correctly.

4. Select a multi-trunk form of Palo Verde instead of one growing on a single trunk.

Desert trees naturally in a multiple trunk form, which distributes the weight of the upper branches. Palo Verde trees that have been trained to grow on a single trunk, are under more stress from the wind with their heavy top half. The majority that you see fallen have been trained into a single-trunk tree.

a large desert museum palo verde tree

This tree needs pruning before the monsoon season to lessen the weight of the canopy

5. ‘Desert Museum’ Palo Verde trees generally need pruning at least once (sometimes twice) a year.

You want to be sure to prune them before the onset of monsoon season – removing any heavyweight or branches that are weakly attached.

Desert Museum Palo Verde Tree in the front garden

Newly-pruned ‘Desert Museum’ palo verde tree ready for the monsoon season

Ensuring the Future of Your Desert Museum Palo Verde

Desert Museum Palo Verde trees are a valuable asset to desert gardens, offering beauty and shade. By following these tips, you can safeguard your tree’s health and stability for years to come. Join me in celebrating the enduring allure of these magnificent desert trees.

Want to learn more about this and other Palo Verde tree species? Check out my previous blog post here.

Sunburned Citrus: Common Signs of Sun Damage

, , , , , , ,

The Sunburn Experience: Not Just for Humans

Have you ever had a sunburn? Maybe a better question is, “Who hasn’t?”

Well, did you know that many plants get too much as well?

Sunburned Citrus: A Common Concern

On a recent visit to a client who was worried about her newly planted citrus trees.

new citrus trees planted in pots.

Sunburned Citrus

The Leaf Yellowing Dilemma on Citrus Trees

This particular client has a large courtyard with several new citrus trees in pots. Her citrus trees, planted in spring, showed yellowing as summer progressed.

sunburned citrus leaves

Now yellow leaves can indicate a number of different problems.  In this case, the diagnosis was rather simple – her citrus tree has a case of sunburn.

Common Signs of Sunburned Citrus and Other Plants

– The areas of the leaf that are yellow are in the center and NOT along the tips or edges.

– Often, the yellow areas begin to turn brown.

– Signs normally occur in the summer months.

– The sunburned leaves are usually located on the south and west-facing parts of the plant.

– This particular citrus tree is in an area that receives reflected, afternoon sun.

Citrus-tree-in-container-ASU


How to Prevent Sunburned Citrus

In this case, the solution is simple. Move the citrus tree to another part of the courtyard that receives afternoon shade is all that is needed to prevent further sunburn damage. Another choice is to put 50% shade cloth on from mid-May through September.

Citrus do best when planted at least 10 – 15 ft. away from walls. Unfortunately walls absorb the heat of the day and re-radiate it out.

Avoid planting where they get the full force of afternoon sun.

Protecting Your Desert Garden From a Heatwave

, , , , , ,
Protecting Your Desert Garden From a Heatwave

Protecting Your Desert Garden From a Heatwave

Summers in the desert garden is hot. That’s no surprise. However, there are periods within these hot months when temperatures climb higher than normal. Because of this, we do need to help protect our gardens from the effects of a heatwave.

So, what is considered a heatwave in the low to mid-altitude desert? As a rule, when the mercury edges above 110 degrees F. During a heatwave, they can even go close to 120 degrees – ouch!

Thankfully, there are things you can do to help prepare the plants within your garden right now.

Here is my #1 tip…

Water your plants deeply the night before three – four day span of 110+ degree are forecast. This is in addition to your regular drip irrigation schedule.

The goal of this supplemental irrigation is to water deeply. This allow the soil to stay moister for longer, which will benefit your plants.

Under normal circumstances, I water my plants for 1 1/2 hours. However, in preparation of a heatwave, I water 2-3 hours. Plants will need more water in order to deal with the extreme temps and the extra water that will be lost to the atmosphere through their leaves.

Don’t do this every night, only every 4 days or so during a heatwave.

My second piece of advice…

Provide temporary shade for young plants in your landscape as they are more susceptible to stress from a heatwave.

This is because they don’t have a well-established root system to uptake much water and sparser foliage, so there aren’t many leaves to shade other parts of the plant.

Shade cloth is useful for protection lasting over several months. But for short-term shade during a heatwave, you can use burlap, sheets, an umbrella, or even place a patio chair over a susceptible plant. Uncover plants once temperatures are within the normal range.

Hot temperatures are a fact of life during the desert summer as are heatwaves. But, implementing one, or both, of these tips will help the plants in your garden.

For more tips for heat-proofing your garden, check out Heatproof Garden: 5 Amazing Tips.

The Ugly Truth – What Over-Pruned Shrubs Really Look Like

, , , , , , ,

Many of us are familiar with how over-pruning can take away much of the beauty of flowering shrubs and contribute to their early death.

But, have you ever wondered what they look like on the inside?

I found this ‘ugly’ example alongside the drive-thru of Taco Bell.

Over Pruned Shrubs

Over Pruned Shrubs

It isn’t pretty, is it?

The side of the ‘Green Cloud’ Texas Sage was sheared away because it was growing over the curb.

The result of planting the shrub too close, OR the wrong plant in the bad space.

You can see the thin layer of leaves that cover the shrub and the dark, interior where sunlight seldom reaches.

This isn’t healthy for your shrubs, shortens their lifespan, and increases the amount of water they require.

If this resembles your shrub(s), the good news is that you can often fix them.

Over Pruned Shrubs

Imagine going from the shrub on the left to the one on the right.

It is possible and often a specific type of pruning known as ‘rejuvenation pruning’ is the way to do this.

In my online shrub pruning workshop, I love teaching my students how to rejuvenate their over-pruned shrubs.

It’s important to note that not all shrubs respond to rejuvenation pruning, but Cassia (Senna species), Sage (Leucophyllum species), Ruellia, Fairy Duster (Calliandra species), and Lantana shrubs respond well as long as they aren’t too old and healthy.

I encourage you to declare your landscape free of shrubs pruned into balls, cupcakes, and squares and transform it into one filled with beauty 🙂

Landscape No-No’s and How to Fix Them: Over Planted, Poodle Pruned Shrubs and Lack of Variety

, , , , , , , ,
Landscape No-No

Photo: Landscape No-No

Addressing Issues in Landscaping: A Guide to Pruned Shrubs

Have you ever driven past a landscape that had some problems with it?  As a horticulturist and landscape consultant, my attention diverts whenever I see ‘Landscape No-No’s’ like this one. In this article, we’ll examine a landscape example and highlight the problems it presents.


Introduction: Identifying Landscape Problems

A while ago, I shared the photo of the landscape, above, on my Facebook page and invited people to identify three things wrong with the landscape.  I received a lot of comments including “looks like Versailles by the inept” and “shrubs arranged like funny-looking ottomans spread across gravel.”  

It’s essential to clarify that the purpose of showcasing landscapes like this isn’t to shame homeowners. Instead, our goal is to help you identify common problems and provide straightforward solutions to correct or prevent them in your landscaping projects.

So, using this landscape as an example, let’s look at the problems and later, focus on how to solve them:

shrubs pruned the wrong way

1. Overcrowded Shrubs

It’s obvious that there are too many plants in this area and the mature size of the shrubs weren’t factored in the original design.  The types of flowering shrubs in this area – desert ruellia (Ruellia peninsularis), Baja fairy duster (Calliandra californica), and ‘Green Cloud’ sage (Leucophyllum frutescens ‘Green Cloud’) are good choices. They are clearly spaced too closely together due to poor pruning.

2. Lack of Plant Diversity

As you can see, there is a tree, a couple of succulents (prickly pear cactus & yucca), and a LOT of shrubs. While there is a variety of plants in the landscape, there’s an overabundance of shrubs compared to other types. The landscape lacks a balanced mix of different plant types, resulting in an imbalance that affects its overall aesthetics.

3. Incorrectly Pruned Flowering Shrubs

These lovely, flowering shrubs are contorted into anonymous, green blobs. They lack in beauty and character.  In fact, you would have to look closely to be able to identify what each shrub is. The problem is what is missing from this landscape. Primarily attractive shrubs which grow into their natural shapes, covered in colorful flowers. Other problems associated with maintaining flowering shrubs this way are that it is stressful for the plant, shortens their lifespan, causes them to use more water to regrow their leaves, and creates more maintenance.

landscape-no-no-badly-pruned-shrubs

Solutions: Correcting the Landscape

Now that we have identified the problems, we can now look at the solutions. I will use the landscape above as my example:

  • Remove excess shrubs. Remove 24 of the 32 shrubs. You will be then have eight flowering shrubs. To decide what shrubs to remove, learn what type of shrub they are and look up how large they are at maturity. Then, make sure that the ones that remain have enough room to grow. Place shrubs up near the house. This anchors the corners of the landscape, and flank an entry.
  • Severely prune back remaining shrubs. Many shrubs have a ‘restart button’ where much of the damage that has been done due to excessive pruning can be reversed. Severe renewal pruning entails pruning back shrubs to approximately 1 1/2 feet tall and wide in spring. You’ll have nothing left but woody branches and little to no leaves. However, this stimulates plants to produce new, healthy growth. Do this pruning in spring. The key is to keep hedge trimmers away from your newly pruned shrubs forever. Prune with hand pruners, loppers, and pruning saws. This will work with most shrubs except for a few that were in declining health.
Which one would you rather have? Learn how to maintain shrubs the right way in the desert garden in my popular shrub pruning workshop

Photo: Which one would you rather have? Learn how to maintain shrubs the right way in the desert garden in my popular shrub pruning workshop

  • Incorporate lower-growing plants such as groundcovers and succulents. A well-designed landscape has plants with varying heights, including those at ground level.  For the landscape above, I’d add a few boulders and plant some gopher plant (Euphorbia rigida) and twin-flower agave (Agave geminiflora) alongside them.  Other ideas for low-growing succulents include ‘Blue Elf’ aloe, Moroccan mound, and artichoke agave.  Flowering groundcovers would also look nice like angelita daisy (Tetraneuris acaulis), blackfoot daisy (Melampodium leucanthum), and sandpaper verbena (Glandularia rigida).  I like to use damianita, trailing lantana, and penstemon for color at lower heights.
Texas sage shrub with natural shape

Photo: Attractive desert landscape with room for plants to grow

Achieving a Balanced and Beautiful Landscape

Here is a snapshot of a landscape area at the Desert Botanical Garden where plants have room to grow. They grow into their natural shape and form.

Transforming the problematic landscape shown earlier, and others like it aren’t difficult, and the results are dramatic.  What a beautiful landscape filled with healthy plants that use less water and need little maintenance.

Are you tired of shapeless shrubs that look like green blobs? I invite you to learn more about how to prune the ‘right’ way. Attend my online Shrub Pruning Workshop.

DIY Natural Household Cleaner From Citrus Peels

Lessons From a Heat-Stressed Desert Garden

, , , , , , , , , , ,
Desert Garden heat with little fuss.

Let’s face it. Hot summers are not surprising to desert dwellers. In fact, a typical desert garden with native and desert-adapted plants will weather intense heat with little fuss.

However, this summer has been one for the books and I’ve seen signs of heat-stress that I’ve never seen before. And yes, within my own garden.

Desert Garden heat-stressed Rock Penstemon and Golden Barrel Cactus

Heat-stressed Rock Penstemon and Golden Barrel Cactus

I must admit that it’s been hard to see certain plants struggling in my desert garden and I know you may have similar feelings. So, why has this summer been so much more difficult than others?

Pink Trumpet Vine partially defoliated due to the heat in desert garden

Pink Trumpet Vine partially defoliated due to the heat

While it is normal to have several days above 110 degrees F., the summer of 2020 is one for the record books. We have experienced not just a couple of stretches of above-normal temps but, several long spans of infernal heat. Damage to plants is often cumulative. This means that the more days of above-average (or below-average) temperatures – the higher incidence of reaction from plants.

Take a walk outside in your garden. You will likely notice some plants that are yellowing, wilting, or have given up and died. However, you may also note that there are some that are doing well.

Why is that? Let me show you some examples from my own garden – the good AND the ugly.

Let’s start with the ugly:

New Mexican Fence Post cactus transplants desert garden

New Mexican Fence Post cactus transplants

In March, much of my backyard was renovated. This included the addition of two separate plantings of Mexican Fence Post cacti. They are located along my back wall and as you can see, one is doing very well while the other makes me cringe when I see the yellowing.

Does the yellowing cactus need more or less water? No. Many succulents yellow in response to summer heat. Of course, this very hot summer has made it more severe. So, why the difference between the two?

The one on the left gets filtered shade in the afternoon from a nearby Palo Verde tree. You can tell that the one on the right doesn’t get any shade but full afternoon sun. In a normal summer, it would be normal to see some yellowing that will return to green once temperatures cool. I am hopeful that will happen. As plants age, they tend to handle heat stress better and as these are young, the stress was especially severe.

Signs of heat stress desert garden

Signs of heat stress

In another area of my garden, I have Green Desert Spoon and Hardy Spineless Prickly Pear, which are very heat-adapted. Yet, they do show signs of mild heat-stress that I haven’t seen before. But, they will green back up in fall. Other plants that are struggling include Artichoke Agave, Gopher Plant, and Shrubby Germander.

I am thrilled that my young Desert Willow tree in this photo is thriving despite the heat. I have four others scattered throughout my landscape and all are doing just as well.

Here are some of the good:

Young Baja Ruellia (Ruellia peninsularis) doing very well in desert garden

Young Baja Ruellia (Ruellia peninsularis) doing very well. The neighbor’s Dwarf Myrtle isn’t.

'Sparky' Tecoma shrub (Tecoma 'Sparky') in desert garden

‘Sparky’ Tecoma shrub (Tecoma ‘Sparky’)

Pink Muhly (Muhlenbergia capillaris). Will soon burst forth in burgundy plumes in fall

Pink Muhly (Muhlenbergia capillaris). Will soon burst forth in burgundy plumes in fall.

Gold Lantana in full sun all day in desert garden

Gold Lantana in full sun all day

Feathery Cassia, Purple Trailing Lantana, and Yellow Bell shrubs are also doing well.

Here are a couple of exceptional performers that get full, reflected sun:

'Rio Bravo' Texas Sage in desert garden

‘Rio Bravo’ Texas Sage

Bougainvillea in desert garden

Bougainvillea

There are still six weeks of summer heat ahead of us. So, what should we do for now?

  1. Be sure plants are receiving enough water. You may need to increase the frequency when temps are above 110 degrees.
  2. Don’t fertilize. Feeding plants simply makes them work harder to produce new growth when all they are trying to do is deal with the heat.
  3. Don’t prune away heat-damaged growth until September. While brown leaves are ugly, they are protecting the interior of the plant. Some pruning is recommended in mid-September, which I teach in my Shrub Pruning Workshop.
garden in the desert with small tree and plants

We don’t know if this summer will be an anomaly or the beginning of a new normal. But, instead of throwing in the towel, I invite you to do the following instead:

Take a stroll through your garden and take note of which plants are doing well and those that aren’t. If this is to be the new norm, it would be a good idea to add more of those that handle the heat well.

desert garden

I am not going to make any major changes in my own garden. Most of my plants have done just fine in past summers. I’ll replace the few plants that died but am hopeful that next summer will be one with average temperatures. If not, then I know what plants have withstood the heat best.

Before we know it, fall will be here, and I for one, can’t wait!

Gorgeous Germander for Desert Gardens

Mesquite Trees and Crazy Branches

, , , , , , , ,
mesquite tree Branches

Have you ever paused in the shade of a mesquite tree (Prosopis spp.) and noticed that its branches grow every which way? 

I was reminded of this when I was visiting a client earlier this week and was advising him on how to care for his mesquite tree. I looked up and saw a cluster of branches growing up, down, sideways, and in curvy pathways.

mesquite tree Branches

Texas Honey Mesquite (Prosopis glandulosa)

In an ideal situation, mesquite trees resemble the shape of more traditional tree species, as shown above. However, they don’t always turn out this way. 

mesquite tree Branches

Have you ever wondered why mesquite trees grow in such crazy ways?

The answer is quite simple – in nature, mesquites grow as large shrubs. The branches of shrubs grow in all directions, up, down, sideways, etc., and so do mesquites.  

The problem arises when we train them up as trees, and their branches don’t always behave as trees do. Because of this, mesquites that have been pruned into trees, do best being pruned by a professional, particularly when they are young and certain branches are being chosen to remain while others are pruned off.

mesquite tree Branches

Of course, this doesn’t always happen, and you can see the results of bad pruning practices in many places. 

I do love the shade that mesquite trees provide and I must admit that I enjoy a good chuckle when I see the unusual shapes that some mesquite trees have taken.

How about you? Have you ever seen a mesquite tree with crazy branches?

Sometimes The Best Thing To Do About Aphids Is Nothing

, , , , , , , ,
To Do About Aphids

Dealing with Aphids on Your Plants: To Act or Not to Act

What do you do when you spot aphids on your plants?

Do you reach for the nearest bottle of insecticide? Spray them off with a hose or remove them with your fingers?  

Believe it or not, sometimes the best thing is to do nothing.

So, is this something I learned in school? No. I figured it out by observing the plants in my first garden.

To Do About Aphids

Lessons from Oleanders: The Case of the Yellow Aphids

I remembered this early lesson when I passed by a severely pruned oleander shrub in front of my favorite bagel shop.  

The oleanders were growing back nicely. However, there were yellow aphids on the young leaves.

To Do About Aphids

Our Instinct to Eradicate: The Impulse to Remove Bugs

Years ago, my oleander shrubs had an infestation of yellow aphids like this, and I was anxious to get rid of them. Really, this is our first reaction when we see bugs on our plants – we want them gone.

I had several methods at my disposal – insecticidal soap, a strong jet of water or my fingers – all of which, would help get rid of most of the bugs. But, life got in the way, and I didn’t have a chance to get out to treat my shrubs until about ten days later.  

The Unexpected Result: The Disappearance of Aphids

Can you guess what I found?  Not a single aphid.  I didn’t have to do a thing, and the aphids were gone, and my shrubs look great.

So, what happened to the little critters?

When harmful insect pests first appear, it can take a week or two before their natural predators follow. In the case of aphids, lacewing and ladybugs showed up and ate the aphids.  

To Do About Aphids

A Hands-Off Approach: Trusting Nature’s Course

Plants are tougher than we give them credit for and can handle a certain amount of insect pests without any adverse effects.  

So, when I come back in a couple of weeks to the same bagel shop, I expect to see no aphids in sight and a healthy oleander shrub.

The lesson here is that you don’t need to freak out when you see these bugs as the normal cycle of nature will take care of them. However, you can step in to get rid of them if you see adverse effects on plants such as wilting, smaller blooms, or discoloration.

Hop Bush: The Alternative to Oleanders

, , , , , , , , ,

No matter where you live, you will see the same shrubs being used over and over again in countless landscapes. While the shrubs may be attractive, their overuse throughout neighborhoods creates a boring appearance because they are so common.

The Allure and Overuse of Oleanders

oleander shrubs in a row

In California, Nevada, and Arizona, oleanders have held a prominent spot in the landscape for years. Their popularity is due to their lush evergreen foliage, ability to withstand intense heat, and their pretty flowers.

However, their overuse in many areas makes their beauty less impactful and frankly, almost forgettable.

The Power of Unpredictability

 At a recent conference, this point was put quite succinctly by the head of horticulture for Disneyland who said,

“When things are expected (in the landscape), they become less powerful and impactful”.

His statement sums up what happens when we use the same plants over and over.

Oleanders’ Ailment: Oleander Leaf Scorch

In the case of oleanders, there is another problem.

Oleander leaf scorch

Oleanders are susceptible to a fatal disease called, oleander leaf scorch. This disease has come from California into Arizona where it is popping up in neighborhoods in Phoenix and also Lake Havasu. I have consulted with several cases affecting large, mature oleanders in Arcadia, Biltmore, and Moon Valley areas in Phoenix. 

This bacterial disease is spread by leaf-hopper insects and there is currently no known cure or control available. Infected oleanders slowly decline over 2-3 years before dying. To date, dwarf oleanders have not shown signs of the disease, only the larger forms. But, that could change sometime in the future.

Seeking a Shrub Alternative: Introducing Hop Bush 

Objectively, there’s a lot to like about oleanders; they thrive in hot, dry climates with minimal fuss, have attractive dark green foliage, and add color to the landscape when in flower. However, their overuse in the landscape makes them less impactful and coupled with their susceptibility to oleander leaf scorch, people want an alternative. 

You can learn more about this disease that affects oleanders here.

Hop Bush along a house wall

When asked for another option for the large, tall forms of oleanders, I recommend Hop Bush (Dodonaea viscosa), also known as Hopseed Bush.

Grab my FREE guide for Fuss-Free Plants that thrive in a hot, dry climate!

Hop Bush is a Versatile Landscaping Solution

This native desert shrub has attractive, evergreen foliage and a similar growth habit to oleander. They grow up to 12 feet tall or prune to a shorter height.

Hop Bush is a green shrub

Use Hop Bush in the same ways as oleanders to provide a nice green hedge or privacy screen.

Hop bush flower

Hop bush flower

Hop Bush has Elegance in Foliage

While they don’t have colorful flowers; they have lovely foliage that is only mildly poisonous as opposed to oleanders which are highly toxic. Hop bush has a lovely natural shape or prune as a formal hedge.

Hop bush as a hedge

Share Your Experience

Have you ever seen hop bush growing in the landscape?  Your insights and experiences are invaluable – feel free to share them in the comments below.

Old, Overgrown Plants: Time to Start Over?

, , , , , , ,
newly-planted landscape

Have you ever driven by a newly-planted landscape?  If so, you probably noticed that many of the plants were quite small.  

I like to joke that sometimes you need a magnifying glass just to see the new plants. But as small as they are, within a short amount of time, those plants start to grow.  

overgrown plants are unattractive.

Look at the same landscape three years later. The plants are well-established and look great.  

Fast forward eight-ten years, and you may start to see signs of some plants becoming overgrown and unattractive.

When this happens to shrubs, we can often push a ‘restart button’ (for most types of shrubs) and prune them back severely in spring using a good pair of loppers, which reduces their size. I use my Corona loppers to do major pruning of my shrubs.

However, there are some plants where this approach doesn’t work.

Let’s identify a few of these plants and how to deal with them once they outgrow their allotted space or become filled with old, woody growth.

Desert Spoon (Dasylirion wheeleri)

Desert Spoon (Dasylirion wheeleri)

Desert spoon is one of my favorite plants.  I love how its blue-gray, spiky leaves add texture to the garden and contrast with plants that have darker green foliage.  

Old, Overgrown Plants

After ten years or more in the landscape, desert spoon can start to take on a ragged, rather unattractive appearance, as well as grow quite large.

When this happens, I recommend that they be removed and a new one planted in its place.  

Now, some of you may think that may seem wasteful, but I invite you to take another look at your landscape and the plants within it.

Your outdoor space isn’t static and unchanging. Its appearance changes with the seasons with plants blooming at different times. Trees gradually extend the amount of shade they provide and plants change in size.  

A newly planted garden doesn’t look the same through the years, it changes.  

Trailing Rosemary (Rosmarinus officinalis 'Prostratus')

Trailing Rosemary (Rosmarinus officinalis ‘Prostratus’)

Rosemary is a good choice for those who want rich, dark green color in the garden. Bees love the light blue flowers that appear in late winter and spring, and the aromatic foliage can be used to flavor your favorite dishes.  

Old, Overgrown Plants

But, as time passes, it does get bigger, outgrowing its original space.  

Old, Overgrown Plants

When this happens, people start to shear their rosemary, which is stressful for the plant and contributes to sections of branches dying.

For those who don’t like the formal look, pruning rosemary back severely would be your first impulse. But, the problem with rosemary is that they don’t respond well to severe pruning.

So again, in this case, it’s best to pull out the old rosemary and add a new one, which will provide beauty for several years.

Rosemary hedge

Rosemary hedge

To avoid having to remove and replace rosemary too often, allow them plenty of room to grow to their mature size.

Red Yucca (Hesperaloe parviflora)

Red Yucca (Hesperaloe parviflora)

Red yucca is prized for its succulent, green leaves that resemble an ornamental grass and its coral flowers, which appear spring through fall.

red yucca Overgrown Plant

Once it has been growing seven years or more, red yucca may overwhelm the landscape visually. This is particularly true if the area it’s growing in isn’t very big.

Occasionally, some people will try to remove the outer leaves at the base. However, this is laborious and only serves to stimulate red yucca to grow back faster.

In those situations, I tell people that their plant has had a nice life, but it’s time to start over.

Newly-planted red yucca

Newly-planted red yucca

You may be thinking, why use plants that you’ll only have to replace after seven to ten years?

Well, all three of these plants add beauty to the landscape and are low-maintenance.

Another way to think of it is to compare your landscape with the interior of your home.  Do you make small changes to the decor of your home every few years to keep it looking fresh and attractive? The same should be true of the outside.

Replacing a few plants after seven years or more isn’t expensive. Don’t you think that the beauty these plants offer to your outdoor space makes them worth it?

What have you replaced in your garden recently?

Got Old, Overgrown Plants? Know When to Prune or Replace