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Bob Morris

Bob Morris

Bob Morris is a horticulture expert living in Las Vegas and professor emeritus for the University of Nevada. Visit his blog at xtremehorticulture.blogspot.com. Send questions to Extremehort@aol.com.

Healing of tree from wind damage can take 2-3 years

After a tree is damaged during a windstorm, healing can take two to three years if the tree is kept in good health. To do that, clean up the wound and apply management practices that encourage it to heal.

Apply annual landscape fertilizer to fix yellowing leaves

Yellowing of bottle brush leaves oftentimes occurs when the soil is low in nutrients and organic matter content. Fix yellowing leaves by applying a landscape fertilizer every year in the spring and combine it with an annual application of chelated iron.

THE LATEST
Spanish lavender handles heat better than other types

Q: I planted a sweet lavender plant last year and it grew great until this August and then suddenly died. It was getting about 2 gallons per watering via two emitters. I would like to replace it with another lavender. It gets morning sun and afternoon shade. What variety of lavender would you recommend we try?

Trim dead branches of lemon tree to desired look

Branch dieback in citrus, particularly lemon, is very confusing. Most likely it is a disease issue called “shoot and twig dieback” of citrus.

Citrus can have problems growing in the desert

This is the Mojave Desert. Las Vegas and the high or middle deserts can have cold winters, unexpected early spring frosts and winds. Depending on the type of citrus, fruit trees can survive cold temperatures ranging from the mid to low 20s all the way to no freeze at all.

Water less often to determine if plants are xeric

One way to find out if an unnamed plant is xeric is to water it less often during the cooler months. If it starts looking bad to your eyes or dies, then it is most likely not xeric.

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