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?

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
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
3 ratings

Monday - February 11, 2013

From: Weslaco, TX
Region: Southwest
Topic: Pruning, Shrubs
Title: Trimming Butterfly Plants
Answered by: Anne Van Nest

QUESTION:

I am looking for detailed information on trimming common butterfly plants: crucita, cenizo, sweet-stem, whitebrush, Mexican trixis, skeleton-leaf goldeneye, white plumbago, turk's cap, desert lantana and Texas lantana. I am creating a guide for volunteer gardeners at Estero Llano Grande State Park in South Texas. I need to know when and how to trim these plants. Thank you for your help.

ANSWER:

Congratulations on having a collection of butterfly attracting shrubs at the Estero Llano Grande State Park and your foresight in creating a cultural guide for the care of these plants.

While there are some general pruning “rules” ultimately you will probably find that each plant will have to be treated individually and have slightly different times when pruning is best done (and differing instruction on what and how much needs to be pruned). After a few seasons and as the volunteer gardeners get to know the plants, it will become apparent that even the rules and guidebook have to be modified at times because the weather (mainly), an unusual fungus attack, or hungry rodents don’t adhere to the rules. So put as much as you can into your guidebook but be aware that it will need to be updated every couple of years!

The first place to look for tips and clues to pruning information about each plant is the Native Plant Database. 

Be on the lookout for general information like “Dies back to the roots in hard winters.” (Chromolaena odorata).

Also very important is the Blooming Time section such as “August to October“ (Chromolaena odorata) as pruning a shrub hard (or even lightly trimming the tips of the branches) just before the blooming time could remove all the bloom.  It is best to prune after the blooming time or well before it starts to bloom.

Also check the Growing Conditions comments section for each plant for comments such as “Because of leggy growth habit, it should be cut back once per year. Dies back to the roots in hard winters. Can be trained as an espalier.”  (Chromolaena odorata)

The Propagation/Maintenance section is also a great place for important pruning information such as “Prune plants to keep compact. Cultivated cenizos tend to become leggier with fewer blooms than in nature. Tip prune to increase density.” (Leucophyllum frutescens)

Lastly, the Benefit/Use Wildlife section has information about whether various wildlife feeds on the seeds or fruit and therefore should be left on for habitat sustainability. Plants with notes such as “seeds for granivorous birds” should have pruning delayed so that the seeds are left as wildlife food. (Chromolaena odorata)

If you can’t find specific information about any of your butterfly shrubs, there are some general principles about when to prune flowering plants that relate to when they bloom. Here’s a previous Mr. Smarty Plants answer about pruning native plants:

For spring-flowering bushes or trees, it is best to prune after they have flowered in the spring since the flower buds are setting in the fall and winter pruning will remove them. Your safest time for pruning summer flowering bushes or trees is in the winter (late November through early February). However, if your plants have gotten too bushy or rangy, you could probably do some judicious pruning almost anytime, being careful not to remove flower buds or too much of the plant at one time. The bottom line is that your pruning strategy pretty much depends on the plant.

Two other places to look for general pruning techniques information is the Texas A&M AgriLife Extension website article, Proper Pruning Techniques and the Pruning Native Plants article from the California Native Plant Society.

Below are the links to the Wildflower Center Native Plants Database for the plants you are researching:

 

 

From the Image Gallery


Jack in the bush
Chromolaena odorata

Cenizo
Leucophyllum frutescens

Rio grande beebrush
Aloysia macrostachya

Whitebrush
Aloysia gratissima

Tropical threefold
Trixis inula

Resinbush
Viguiera stenoloba

Turk's cap or turkscap
Malvaviscus arboreus var. drummondii

Brushland shrubverbena
Lantana achyranthifolia

Texas lantana
Lantana urticoides

Doctorbush
Plumbago scandens

More Pruning Questions

Ash tree dying back to lower sprouts in Kempner TX
June 19, 2010 - My 2 year old ash tree leaves dropped, appears dead, branches dying. New growth near base of tree. Do I cut upper trunk or remove entire tree? My other ash is doing well.
view the full question and answer

Yellowing leaves on non-native weeping birch in Brick NJ
August 16, 2009 - I have a young weeping birch-planted in spring-we water regularly, it gets good sun-and rain has been perfect--the leaves get yellow--and now they are a lot! Whats the matter? I love my little tree.I ...
view the full question and answer

Shaping of native hawthorns
October 21, 2007 - I have three young hawthorns that were propagated from a nearby Blackland prairie stand. If I limb them up, will that encourage them to branch more near the top, or will it just ruin the form altoget...
view the full question and answer

Can I trim back my 20 ft Yucca plant?
May 11, 2009 - I have a yucca tree which is about 20 ft. tall, has four main trunks. I would like to prune it to approx. 10 ft. but wonder if that will kill it or if new shoots will come out up near the cut.
view the full question and answer

Decorative Trees for Scenic Bench in Fairhope IL
June 10, 2012 - I am looking for a recommendation for a pair of small trees (does not grow taller than 18-20 feet) that can provide shade on either side of a stone bench. The site is in full sun, western exposure an...
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center