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
Not Yet Rated

Friday - October 09, 2009

From: Woodland Hills, CA
Region: California
Topic: Shrubs
Title: Leaves falling off a hibiscus twice a year in Woodland Hills CA
Answered by: Barbara Medford

QUESTION:

I have 8 hibiscus bushes and only 1 of them loses its leaves twice a year. Why?

ANSWER:

There are 12 species of Hibiscus native to North America, of which 3 are known to grow in California. It doesn't really matter though, because you almost undoubtedly have one of the many hybrids, and/or imports from other countries. Both the hybridization and being non-native would put them out of our area of expertise, but we can ask you some questions which, when you answer them, could give you a clue to what's going on.

1. How many times has this hibiscus repeated this behavior of dropping leaves twice a year? If it was once, it may have been the result of some change in its environment. If it has happened multiple times, you need to look at where it is growing and how it is growing.

2. What sun does it get? Hibiscus can grow in a little shade, but they do best in full sun; that is, 6 to 8 hours of sun a day. 

3. Is the plant in question growing in the same area as the other 7? If not, what is different about where it is, as opposed to the others? Again, soil moisture, sun, even accidental exposure to a pesticide could have caused the leaf drop.

We found a website called "About Hibiscus", Hibiscus Care, that seems to have the most information on this plant. Read it and compare the conditions considered optimum for hibiscus with the conditions of the plant you are concerned about.

 

More Shrubs Questions

Texas natives that attract butterflies but not deer
December 13, 2012 - I'd like to have some plants in my garden that are butterfly attractors, but that whitetail deer won't like. I can find lists of butterfly plants, and lists of deer-resistant plants -- is there a li...
view the full question and answer

Lilac bush roots dangerous to house foundations
August 06, 2008 - Are lilac bushes dangerous to the foundation of a house? There is a lovely white-blooming lilac that grows against the house outside my bedroom window. My ex-husband said that the roots would destro...
view the full question and answer

Evergreen shrubs for full sun in North Carolina
October 21, 2009 - We need suggestions for native NC evergreen shrubs that will grow well in full sun for a school garden. Most of what I've found likes part shade. We need something that will not be over 10 feet or ca...
view the full question and answer

Shrubby options for a bird lover in New Jersey
September 07, 2011 - Could you please recommend a native shrub to NJ that grows to about 3-4 feet, is very low maintenance, does well in afternoon sun and is also something the birds will like? Thank you.
view the full question and answer

Non-native eleagnus from Jesup GA
January 17, 2014 - An elderly farmer has told me about a plant called Alley Agnes, but I can't find any plant by this name anywhere. He doesn't know another name for it, says it's what everyone has always called it i...
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
© 2014 Lady Bird Johnson Wildflower Center