Host an Event Volunteer Join Tickets

Support the plant database you love!

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?

Share

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Sunday - May 04, 2014

From: Austin, TX
Region: Southwest
Topic: Xeriscapes, Planting, Trees
Title: Appropriate use of redbud from Austin
Answered by: Barbara Medford

QUESTION:

I am considering purchasing a hearts of gold redbud; I am also xeriscaping my front yard. I live in Austin,TX. Will this tree do ok in full Tx sun (8+ hours) with once a week watering? If this tree is not optimal, can you suggest similar flowering trees that will handle these conditions better.

ANSWER:

This USDA Plant Profile Map shows that Cercis canadensis var. texensis (Texas redbud) grows natively in Travis County, so of course we would consider that optimal.

However, from this Plant Finder from Missouri Botanical Garden, we learn that there is a Cercis canadensis (Eastern redbud) which has a trade name of 'Hearts of Gold." Again going to the USDA Plant Profile Map, this time on Cercis canadensis (Eastern redbud),  it still grows natively in Travis County, so you're okay on that point.

Follow this plant link, Cercis canadensis (Eastern redbud), to our webpage on that plant, where you will find these Growing Conditions:

"Growing Conditions

Water Use: Low
Light Requirement: Part Shade , Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
Soil Description: Moist, fertile, well-drained soils."

So, first, you need to determine if you have a good shade (2 hours or less of sun a day) or part shade (2 to 6 hours of sun) to put your new plant. But the most important thing is not where but when to plant a woody plant. That 8+ hours you cite is probably going to fry a new little plant. We strongly recommend that in hot, dry Central Texas woody plants (shrubs and trees) be planted in cool weather, preferably December and January. We suggest that before you spend that money on a likely-doomed tree, you rethink your plans. We could suggest some trees native to this area that can take the full sun, but we still don't recommend planting them now. For instance, here are the Growing Conditions for Cercis canadensis var. texensis (Texas:

"Growing Conditions

Water Use: Low , Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Soil pH: Alkaline (pH>7.2)
CaCO3 Tolerance: Low
Drought Tolerance: Medium , High
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Well-drained, calcareous, rocky, sandy, loamy, or clay soils, usually limestone-based.
Conditions Comments: Drought- and cold-tolerant within its range. Give dappled shade when young. A selection called Sanderson is said to be the most drought-adapted Texas redbud cultivar."

So, that would do fine, but NOT IF YOU PLANT IT NOW. And don't buy one to save and plant in late Fall. Those black plastic nursery pots are not designed for survival of the resident plants. Wait until the right time of year, and then buy a good, fresh plant and be sure to insist that the roots be pulled out of the can beforehand, so you can make sure they are not pot-bound, with roots circling inside.

 

From the Image Gallery


Texas redbud
Cercis canadensis var. texensis

Texas redbud
Cercis canadensis var. texensis

Eastern redbud
Cercis canadensis

Eastern redbud
Cercis canadensis

More Trees Questions

Need for sunlight for Sophora secundiflora to bloom
June 22, 2007 - My mountain laurel doesn't bloom. We live in Oak Hill and planted it about seven years ago. It bloomed one year at about age three or four. Since then nothing. What can I do? It only gets indire...
view the full question and answer

Controlling Tree Roots in Sewer Lines
July 16, 2014 - We had a leak with our underground pipes near the meter box - the pipes are at least a foot or more underground. My plumber poured table salt on the pipes to deter roots from a nearby tree from gettin...
view the full question and answer

Bracket fungus on live oaks
October 04, 2007 - I live in Cedar Park and the house we just bought has 4 native live oaks growing in the front yard. On two of the live oaks there are bracket fungi growing at their base. Each tree just produced two n...
view the full question and answer

Timing for transplanting a yaupon in Louisiana
January 01, 2009 - I found a female yaupon growing wild at the back of my property and would like to move it to the front. When should I do this?
view the full question and answer

Transplanting Trees in OH
May 10, 2012 - Is the middle of May too late to dig out Arborviteas and spruces to transplant? I live in central Ohio.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.