Posts

My Abraham Darby shrub rose and my little dog, Tobey.
If you live in a hot arid climate like me, 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. 
 
Roses actually grow quite well in hot, southwestern zones, and even though mine has a somewhat sunburned appearance – 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 literally burn in the sun and turn crispy.  By July, you will likely not see any new roses appearing until October once the weather cools.
 
The rose blooms themselves aren’t the only parts of the roses affected by the summer heat – the leaves can come away sunburned as well.
 
When faced with brown crispy petals and leaves, you may be tempted to prune away the damaged leaves, but don’t.  
 
There are two reasons why you shouldn’t prune your roses in the summer.  The first is that 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 from the sun.
 
I know that is very hard not to prune away the browning leaves, but once September comes around, you can get out your pruning shears and prune back your rose bushes by 1/3. This will remove the sun-damaged flowers and leaves, stimulating new growth. 
 
 
Before you start lamenting the less than stellar appearance of your summer roses and feel that it is easier to grow roses in other regions, you would be wrong. Oh, certainly we have to deal with our roses not looking their best in the summer.  But, compare that with gardeners in other areas who have to deal with the dreaded Japanese beetle that shows up every summer and eats their roses. Or, how about those 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).  
 
And lastly – we are fortunate to enjoy two separate blooming 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.
 
 
And so, I will ignore my less than beautiful roses this summer, because I know that they will look fantastic this fall 🙂
 
How about you?  Do you grow roses in the desert?
 
 
 

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


Well, did you know that many plants can get sunburned too?

I recently made a house call for a client who was worried about her newly planted citrus trees.


This particular client had a large courtyard where she had several new citrus trees planted in pots.

The citrus had been planted that spring and she began to notice the leaves on her orange tree turning yellow as the summer progressed.


Now yellowing leaves can indicated a number of different problems.  But in this case, the diagnosis was rather simple – this citrus tree was suffering from sunburn.

Here are some common signs of sunburned 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 generally located on the south and west-facing parts of the plant.

– This particular citrus tree was located in an area that received full, reflected, afternoon sun. 

So, what can you do to prevent sunburned citrus?

In this case, the solution was simple – moving the citrus tree to another part of the courtyard that received afternoon shade was all that was needed to prevent further sunburn damage.

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

Avoid planting where they get the full force of afternoon sun.
If your citrus trees suffer sunburn every summer, you can provide temporary shade using shade cloth. 

Have you ever had sunburned plants?  What did you do to prevent furture sunburn?

This is the first of a new series called “Garden House Calls” where I share the answers to questions that I am often asked in my work as a horticulturist and landscape consultant.  
Did you know that you can often tell what is wrong with a plant by looking at its leaves?
 
It’s true.
 
Manganese deficiency
 
‘Reading the leaves’ to diagnose common plant ailments isn’t hard to do if you know what symptoms to look for.


Problems such as iron or nitrogen deficiency are fairly easy to identify as is salt and sunburn damage.


Read on to learn how to diagnose these problems in your plants in my latest Houzz article: