Desert Willow Trees
Q.

Why is my desert Willow losing all of its leaves? The leaves have brown spots on them.

Zone 76182 | mebachman added on August 11, 2018 | Answered

Over half of the branches are bare of leaves. the plant is definitely not thriving.

A.
A.Answers to this queston: Add Answer
drtreelove
Certified GKH Gardening Expert
Answered on August 12, 2018

I would suspect that your heat/drought conditions and appropriate deep watering should be your first consideration.

https://www.gardeningknowhow.com/ornamental/trees/desert-willow/caring-for-desert-willow-trees.htm

Desert willow trees are know to be relatively resistant to pests and diseases, but there are some possibilities for disorders:

Invertebrates:
Aphids

Diseases:
Verticillium wilt

Environmental disorders:
Mineral deficiencies
Nutrient and mineral excesses
Poor water management

Weeds
Vertebrates: gophers

It is not possible for us to give a definitive diagnosis without more information on growing conditons and management. You may need a site visit from a local consulting arborist or university extension service advisor.
https://plantclinic.tamu.edu/

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