Rent Shop Volunteer Join

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

Friday - July 04, 2014

From: Austin, TX
Region: Southwest
Topic: Pruning, Herbs/Forbs
Title: Optimal time for trimming Fall asters
Answered by: Guy Thompson

QUESTION:

RE: fall asters What is the latest date in the summer that I can trim my fall asters and still get a good amount of blooms in October?

ANSWER:

Symphyotrichum oblongifolium (Aromatic aster) or Fall aster does tend to become leggy, especially if watered regularly.  It is recommended that it be pruned back by about half in June.  I would imagine you could stretch that to early July, but hurry.

 

From the Image Gallery


Aromatic aster
Symphyotrichum oblongifolium

More Pruning Questions

Pruning time for Lonicera sempervirens from Pflugerville TX
August 08, 2011 - Dear Mr. Smarty Plants, When does the Wildflower Center prune its Lonicera sempervirens?
view the full question and answer

Controlling pumpkin vine in British Columbia
July 15, 2008 - I have never grown pumpkins before but decided to try one plant this year. It seems to be taking over my small garden space. Can I prune it back? I only want one or two pumpkins for my grandchildre...
view the full question and answer

Failure to bloom of Tecoma stans in Austin
August 02, 2008 - We Planted a Yellow Esperanza shrub 2 years ago that was blooming when we purchased it. It bloomed very little last year and not at all this year. It looks very healthy and each year gets about 10 f...
view the full question and answer

Pruning non-native oleanders
September 28, 2011 - I have an oleander that has become to "leggy". I read the pruning instructions, but where I want to prune, there are not any leaf nodes. Can I trim below at the base, or will I hurt the plant? I ...
view the full question and answer

Growing Grapes in Southern Texas on an Arbor
July 02, 2014 - I've redirected several grape vines (from the top third of a broken oak tree) onto an arbor. The base of the vine is about 3 or 4 inches in diameter. Is it feasible to work with (prune) the smaller b...
view the full question and answer

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