En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?


Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
rate this answer
Not Yet Rated

Thursday - July 15, 2010

From: Rockwall, TX
Region: Southwest
Topic: Soils, Trees
Title: Blooms on Desert Willow withering quickly in Rockwall TX
Answered by: Barbara Medford


Why do the blooms on my Desert Willow dry up and wither away in one or two days?


We really don't have enough clues about the history of your Chilopsis linearis (desert willow), so we'll true to find some that will help you. Is this the first year you have had it, or that it has bloomed?  The blooms appear after summer rains, and in early autumn are replaced by th slender seedpods. According to the USDA Plant Profile on this plant, it is native to the Big Bend area and far west Texas, with a few isolated locations, including Travis County, where the Wildflower Center is, where they are cultivated, also. You are, however, in USDA Hardiness Zone 8a, as is Travis County, so it should be all right there in terms of temperatures, but we don't know about your soils.

Here are some of the Growing Conditions which may also give us some clues:

"Water Use: Low
Light Requirement: Sun
Soil Moisture: Moist , Dry
Drought Tolerance: High
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Well-drained limestone soils preferred, but also does well in sands, loams, clays, caliches, granitic, and rocky soils. Minimal organic content the norm.
Conditions Comments: Allow to dry out between waterings, as this will encourage more extensive waves of blooms. Avoid excessive water and fertilizer, as that can lead to overly rapid growth, fewer blooms, and a weaker plant. Prolonged saturation can result in rot. Won't grow as fast or get as large in clay soil but won't suffer there either. Can be drought-deciduous in some regions. Can survive temperatures as low as 10 degrees F."

And under Bloom Information on our page on this plant:

"Bloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: Mostly blooms heaviest May to June but will continue to bloom sporadically throughout the warm season after rains."

We looked at a lot of research material on this tree, and got pretty much the same bloom information from all of it, but no average length of time that the blooms remained on the tree. The blooms occur at the tips of branches on new growth, and are fairly fragile. Just theorizing, on the basis of our research, we wonder if perhaps the bloom life you are seeing is normal. If you have no previous experience with the plant, that could be the case.  We would also like to call your attention to the warnings above about over-watering and over-fertilizing. This tree is native to desert washes, in very infertile soil. Too much fertilizer and/or too much water could throw it seriously off balance. And if the tree roots do not have very good drainage, they can rot out. If it is planted in the clay soil that is pretty common in your part of the state, that could well be what is going on. If the area is watered  by a sprinkler system, not only could the tree be getting too much water, but the sprinkler streams could be knocking the flowers off. And, most important, it must be in full sun to bloom well. We consider full sun to be 6 or more hours of sun a day. 

From our Native Plant Image Gallery:

Chilopsis linearis

Chilopsis linearis

Chilopsis linearis

Chilopsis linearis






More Trees Questions

Newly planted anacacho leaf browning
October 15, 2007 - I have just put my anacacho orchid into the ground and its leaves are turning brown and falling off. Is that normal for this time of year, or have I shocked it? What can I do to ensure its health?
view the full question and answer

The perfect tree for San Rafael CA
November 10, 2009 - Want to plant a tree that is slow growing and has shallow root system that won't lift the concrete, that does not shed, and is green throughout the year.
view the full question and answer

Quaking Aspens in Albuquerque
October 25, 2010 - How do quaking aspens fare in north east Albuquerque?
view the full question and answer

Small flowering tree for cemetery in TX
November 07, 2010 - I am looking for a native large shrub or small tree to plant at a cemetery in Pflugerville, TX, preferable something with flowers. I need something that won't have a large root system that would dis...
view the full question and answer

Chlorosis in sycamore in Kyle TX
August 04, 2011 - I'm trying to assist an elderly neighbor of mine with a plant issue. We have designated street trees in this community, our street being a Sycamore. The previous foreman out here called it a Mexica...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
© 2015 Lady Bird Johnson Wildflower Center