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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.  
 
 
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 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.  
 
 
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’)
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.  
 
But, as time passes, it does get bigger, outgrowing its original space.  
 
 
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
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 is prized for its succulent, green leaves that resemble an ornamental grass and its coral flowers, which appear spring through fall.
 
 
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
 
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?

Overgrown, old Texas sage (Leucophyllum frutescens ‘Green Cloud’)

You have undoubtedly seen an old, overgrown shrub filled with mostly leafless branches that rarely flower anymore. Or, perhaps it is an aged succulent that has brown patches that are slowly encroaching onto the upper parts of the plant from the base. So, what is the solution for plants that no longer add decorative value to our landscape?

Old rosemary filled with unproductive woody growth

While some woody plants such as Texas sage or oleander can be rejuvenated by severely pruning them back, not all plants respond favorably to this and grow out again. Let’s take a look at some Southwestern favorite shrubs and succulents and talk about whether you should prune severely or when it’s best to replace.

Oleander that has undergone severe renewal pruning in spring.

Many shrubs can be rejuvenated by severely pruning them back, which gets rid of old, woody growth and stimulates the production of new branches, which will flower more (in the case of flowering shrubs). It is helpful to think of severe renewal pruning as the “fountain of youth” for many plants. This type of pruning is best done in spring, once the weather begins to warm up. Shrubs that respond well to this include bougainvillea, jojoba, lantana, oleander, Texas sage, and yellow bells. It’s important to note that not all shrubs will come back from this method, but the pruning didn’t kill the shrub – it only hastened the demise of the plant that was already in progress. If this happens, replace it with another.

Old desert spoon (Dasylirion wheeleri)

There are some plants that don’t respond well to renewal pruning or where that isn’t possible to do in the case of succulents. In this case, the solution is simple – take them out and replace them with a younger version of the same plant. Examples of plants that are better removed and replaced include aloe, desert spoon, red yucca (hesperaloe), rosemary, and prickly pear cactus. When you think about it, the cost isn’t very high, when you consider the beauty that these plants added to your landscape for eight years or more.

Heavenly Cloud Texas Sage several weeks after severe pruning.

When you think about it, the cost isn’t very high, when you consider the beauty that these plants added to your landscape for eight years or more.

*Have you severely pruned back an old shrub and had it come back beautifully? Or, maybe you recently removed and replaced some old succulents?