Summers in the desert garden are hot. That’s no surprise. However, there are periods within these hot months that 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.

Many of us are familiar with how over-pruning can take away much of the beauty of flowering shrubs, in addition to contributing to their early death.

But, have you ever wondered what they look 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 wrong 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 certain 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 not 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 🙂

Aren’t these shrubs beautiful?

Texas Sage ‘Green Cloud’ (Leucophyllum frutescens ‘Green Cloud’)

Thunder Cloud Sage (Leucophyllum candidum ‘Thunder Cloud’)

‘Rio Bravo’ Sage (Leucophyllum langmaniae ‘Rio Bravo’)

You would think that the beauty of these shrubs, in flower, would be enough for people to stop pruning them into absurd shapes, but sadly, this is not the case. In the Desert Southwest, there is an epidemic of truly horrible pruning that affects not only Texas Sage (Leucophyllum species), but also Cassia (Senna species), Fairy Duster (Calliandra species) and even Oleander.

Unsurprisingly, excessive pruning like this is NOT healthy for shrubs and it strips them of their beauty.

You don’t have to go far to see these sad shrubs. All you need to do is drive down the street, like I did…

Okay, it should be rather obvious, but I will say it just the same,  “Do not prune your shrubs into the shape of a ‘frisbee’.

I kept driving and found even more examples of truly awful pruning.  Sadly, all within a 5-minute drive of my house.

I call this ‘pillbox’ pruning. These Texas Sage & Cassia shrubs were located across the street from the ‘frisbee’ shrubs.

An attempt at creating a ‘sculpture’? Texas Sage ‘Green Cloud’ (Leucophyllum frutescens ‘Green Cloud’)

 A second attempt at creating a sculpture?

Let’s get real. Shrubs pruned this way do nothing to add beauty to the landscape. And, when pruned this way, they cost more, take more time, and use more water – it’s true!

Now on to some of my favorite ‘cupcake’ examples:

An entire line of ‘cupcakes’. ‘White Cloud’ Texas Sage (Leucophyllum frutescens ‘White Cloud’) 

Do you think they use a ‘level’ to make the tops perfectly flat? I honestly wouldn’t put it past them.

You can see the dead area on the top, which is caused from this shrub being sheared repeatedly.

This dead growth is caused by lack of sunlight.  Repeated shearing (hedge-trimming) keeps sunlight from reaching the interior of the shrub.   As a result, branches begin to die.

After driving around for awhile, I drove toward home when I saw the saddest ones of all…

 Now if you look closely, you can see a light layer of gray-green leaves, which really don’t begin to cover the ugly, dense branching that has been caused by years of repeated shearing.

 I actually like topiary, but not when done to a Texas Sage. Some people prune up their shrubs so that they can clean up the leaves underneath more easily.

Now, I am not against formal pruning, when performed on the right plants.  But, it is not attractive when done on flowering, desert plants and it is also unhealthy for the shrubs themselves and contributes to their early death in many cases.  Add to that the fact that it greatly increases your maintenance costs due to repeated pruning and having to replace them more frequently.

Now if you have shrubs that look like any of these pruning disasters, don’t panic! They can be fixed in most cases.

 Now, why would anyone want to remove the flower buds from your shrubs by shearing,  when you can have flowers like this?

If you are tired of unnaturally shaped shrubs in your landscape, I understand.

Believe it or not, most flowering shrubs need pruning once or twice a year at most – and NOT the type of pruning into weird shapes.

I find it ironic that your yard will look better when you do less.

So, if you are wanting to declare your landscape a ‘cupcake-free’ zone, I have something I think you’re gonna love. I invite you to check out my popular online shrub pruning workshop where I teach you how to maintain flowering shrubs by pruning twice a year or less. Hundreds of students have taken the course and are reaping the rewards of a beautiful outdoor space filled with colorful shrubs at a fraction of the work.

Are you ready to break out of the cycle of green blobs?

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

Roses Feeling The Heat

Photo: Roses Feeling The Heat , My Abraham Darby shrub rose and my little dog, Tobey.

If you live in a hot arid climate, chances are that your roses are feeling the heat and aren’t looking their best right now. While gardeners in cooler climates celebrate summer with beautiful rose blooms, the opposite is true for those of us who live in the desert.

Surprisingly, roses actually grow quite well in hot, southwestern zones, and even though mine look somewhat sunburned – I’m not worried because this is normal.  

You see, roses that are grown in the low desert regions, don’t like the intense sun and heat that summer brings. As a result, the flowers become smaller, and the petals burn in the sun and turn crispy.  By July, you are unlikely to see any new roses appearing until Fall.

Roses Feeling The Heat

The rose blooms aren’t the only parts of the roses affected by the summer heat – the leaves can become sunburn.  

The sight of brown crispy petals and leaves may make you want to prune them away, but don’t.    

Why?

Pruning will stimulate new growth that will be even more susceptible to sunburn damage.  Second, the older branches and leaves will help to shade the growth underneath the sun.  

I know that it is very hard not to prune away the brown leaves – I feel you. However, in September, pull out your pruning shears and prune back your rose bushes by 1/3. This removes the sun-damaged flowers and leaves, and stimulates new growth. 

Roses Feeling The Heat

If you lament the less than stellar appearance of your summer roses and feel that it’s easier to grow roses in other climates, you would be wrong. 

Oh, certainly, we have to deal with our roses not looking great in the summer.  But, compare that with gardeners in other regions who have to deal with the dreaded Japanese beetle that shows up every summer and eats their roses. Or, people who live in more humid climates and are having to deal with severe cases of blackspot or powdery mildew (white spots on the leaves).    

Lastly – we are fortunate to enjoy two separate bloom seasons for our roses.  In fall, when many other gardeners are putting their roses to bed for the winter, ours are getting ready to bloom a second time that year.

Roses Feeling The Heat

And so, I will ignore my less than beautiful roses this summer, because I know that they will look fantastic this fall 🙂

Two New Roses Find a Home in a Desert Garden

self-planted bouquet

Have you ever had the experience of receiving an unexpected self-planted bouquet?

I’ve been blessed to have gotten bouquets throughout my life from my wonderful husband, my children, and in the past – from a boyfriend or two.

But recently, I was presented with a bouquet from an unlikely source.

self-planted bouquet

If you look up the definition of the word, ‘bouquet’, it states “an attractively arranged bunch of flowers, especially one presented as a gift or carried at a ceremony.”

This spring, I was delighted to see that my garden had presented me with an unexpected bunch of flowers – in other words, a bouquet.

This area in my front garden has a lovely Sandpaper Verbena (Glandularia rigida), which is a ground cover with vibrant purple flowers. It blooms spring through fall and thrives in full sun.

I planted the Sandpaper Verbena, however, I didn’t add the other flowers in this area.

Last year, I noticed the white flowers of Blackfoot Daisy (Melampodium leucanthum) growing up in the middle of the Verbena. It came from a seed from a nearby plant that alighted in this area and grew in the presence of irrigation.

I liked the look and as the plants were doing well together, I left them to their own devices.

Well evidently, someone else wanted to join the party. Enter, Angelita Daisy (Tetraneuris acaulis) that came up on its own. I have several throughout the landscape and they do self-seed sometimes.

I absolutely adore colorful plants and I must say, I am so happy with this bouquet growing in my garden. As long as they play nice and one doesn’t try to take over the other, they can remain.

Who knows who will show up in my living bouquet next year?

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?

To Do About Aphids

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

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

To Do About Aphids

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

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 aphids. 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.  

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 aphids?

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

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 aphids 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.

One of my favorite things I do as a landscape consultant is to show my clients newer plant and shrub introductions on the market.

Imagine being the first person on your block with the latest plant that all your neighbors will want to add in their landscape.  

Orange Jubilee shrub

Tecoma x ‘Orange Jubilee’

Many of you may be familiar with the large, orange-flowering shrub Tecoma x ‘Orange Jubilee’. This popular shrub has clusters of trumpet-shaped flowers and a long bloom period. Its large size 8-12-foot height makes it a favorite for screening out a block wall or unfavorable view.

While the flowers and lush foliage are a plus, Orange Jubilee is too large for many smaller areas, which is why this newer shrub is one of my new favorites. 

'Sparky' Tecoma shrub

‘Sparky’ Tecoma is a hybrid that has bi-colored flowers and is named after Arizona State University’s popular mascot due to the coloring. It was created by a horticulturist and professor at ASU.

Sparky shrub

‘Sparky’ is about half the size of ‘Orange Jubilee,’ which makes it suitable for smaller spaces. It has smaller leaves and a slightly more compact growth habit, reaching 4-5 feet tall and wide.

Both types of Tecoma have the same requirements – plant in full sun and prune away frost-damaged growth in March.  ‘Sparky’ is slightly more cold tender than ‘Orange Jubilee’.

new Shrub

I have added three of these lovely shrubs in my front garden. One along my west-facing side wall, and two that flank either side of my large front window. They add beautiful color 9 months a year.

For those of you who are U of A alumni, you can plant one and call it something else. To date, there isn’t any word of a red, white and blue hybrid yet – but, I’ll be sure to let you know if they create one 😉

Creative Container Gardening

Spring in the desert brings a flurry of activity out in the garden – much of it involving container gardening.

As they say, in late spring, it’s “out with the old and in with the new.” In the desert garden, it’s when cool-season flowering annuals are traded out for those that can handle the hot temperatures of summer.  

Examples of cool-season annuals are pansies, petunias, and snapdragons, which are grown fall through spring. BUT, they won’t survive hot, desert summers. So, in late April, it’s time to plant flowering annuals that can take the heat. My favorites include angelonia, ‘Blue Victoria’ salvia, and vinca.

While flowers are a popular pot filler, there are so many other things that you can do with growing plants in containers.

Here are some of my favorites:

Jazz up the appearance of your containers by painting them a different color.

beautiful container

Let’s face it – beautiful containers can be expensive while inexpensive plastic containers are a bit boring. I like to dress up my plastic containers by adding a coat of paint.  

Many spray paints can be used on plastic and last a long time. I have several painted pots in my garden that add a welcome splash of color.

Grow herbs and vegetables along with flowers in pots.

Leaf lettuce and garlic grow along with flowering petunias in Container

Leaf lettuce and garlic grow along with flowering petunias.

Did you know that you can grow vegetables in pots? I love doing this in my garden. In the fall, I plant leaf lettuce, spinach, and garlic in my large pots alongside flowering petunias. When March arrives, I like to add basil, peppers along with annuals.

Winter Container Gardening with spinach, parsley and garlic growing with pink petunias

Winter container garden with spinach, parsley and garlic growing with pink petunias.

For pots, I recommend you use a potting mix, which is specially formulated for containers and holds just the right amount of moisture.  

Container plants need to be fertilizer. You can use a slow-release fertilizer or a liquid fertilizer of your choice.

Cucumbers growing with vinca and dianthus Container

Cucumbers growing with vinca and dianthus.

In spring, vegetables such as cucumbers, bush beans, and even zucchini can grow in containers paired with flowers. 

*If you would like to try growing edible containers, click here for more info.

Plant succulents for a low-maintenance container.

Creative Container Gardening

My favorite filler for containers in the desert garden is cacti and succulents. They do very well in pots and need less water than those filled with flowering annuals and perennials.

Desert Spoon (Dasylirion wheeleri) Container

Desert Spoon (Dasylirion wheeleri).

Succulents are an excellent choice for planting in areas where water is not easily accessible. While they will need supplemental water, they don’t need water every day, making them a better choice for these areas.

cactus & succulents Container

In general, succulents are lower-maintenance as well, so they are an excellent choice for the ‘fuss-free’ gardener.

Use a potting mix specially formulated for cactus & succulents, which will drain well.

Fertilize succulents spring through fall using a liquid or slow-release fertilizer at 1/2 the recommended strength.

*For more information on how to plant succulents in containers, including how to do it without getting pricked, click here.

Fill the bottom space of large pots with empty, plastic containers. 

Container Gardening

Let’s face it – potting mix is expensive and makes your pots very heavy. If you have a large pot, your plant’s roots most likely will never reach the bottom – so why waste soil where you don’t need it?

Fill up the unused space with recycled plastic containers and then add your potting mix. You will save money, AND your container will be much lighter as well. 

Whether you are new to gardening, an experienced pro, or have a small or large garden space – I invite you to reimagine what you can do in a container!