En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Non-native Hyacinth Bean vine dying

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
1 rating

Tuesday - June 17, 2008

From: Lake Winnebago, MO
Region: Midwest
Topic: Vines
Title: Non-native Hyacinth Bean vine dying
Answered by: Joe Marcus

QUESTION:

I live in Missouri and have tried to grow hyacinth bean. Mine drop leaves (after some yellow appears on on them)and the vine turns yellow, then withers to brown. Other places near me grow them beautifully. Too much water maybe? they are in potting soil, clay pot, sun to some shade during the day. Please help! Thanks!!

ANSWER:

Hyacinth bean, Lablab purpureus (syn=Dolichos lablab) is native to Africa.  This is germane to your question only in that the Wildflower Center focuses solely on North American native plants.  However, since your plant problem is general in nature, we may be able to help.

Too much water is a definite possibility.  The growing conditions you describe sound generally favorable for your plant, but if you're getting a lot of rain or are not letting the soil dry out some between waterings, then the roots may be rotting.  If that is the case, you will need to cut the top back hard to save the plant since the remaining roots will not be able to support the abundance of foliage on the vine.

Another possibility is an infestation of thrips and/or spidermites.  Both are tiny creatures which suck feed on plant foliage and cause yellowing and leaf drop.  Check the underside of the leaves with a magnifying glass and look for any barely-visible green or red critters inhabiting the plant.  If spider mites or thrips are there, insecticidal soap will usually take care of the problem.

If you have a good local nursery in your area, you might remove a piece of the vine - not just a single leaf - put the vine in a clear plastic zip-top bag and let a professional horticulturist take a look at it for a more specific diagnosis.

 

More Vines Questions

Report on object glowing in tree in New Hampshire
August 04, 2013 - Hello again Mr Smartpants. I commented about a purple glow coming from a tree in previous comments. Since then they have multiplied and are spreading to different trees. We believe we may have it narr...
view the full question and answer

Identity of vine with orangish flowers
July 09, 2014 - I am looking to ID what I believe is a vine growing plant that blooms orangish flowers. I have pictures of the plant, and have attempted to use multiple plant ID websites. But have been unsuccessful. ...
view the full question and answer

Texas natives for a small garden with red flowers
October 03, 2009 - I have a garden that is 4' deep, what can I put there that is a Texas native, I would really like some color (preferably red)also it needs to be able to grow tall (8 - 10')
view the full question and answer

Honeysuckle bush for San Antonio, Tx
June 14, 2009 - I'm looking for a gift for my brother, living in San Antonio. He loves the native honeysuckle that we both remember from our childhoods. I think I'd like to get him a honeysuckle bush rather than ...
view the full question and answer

Native Vines for Pacific Northwest
June 30, 2010 - Hello, I recently built a shed/pen for my large dog. I have a trellis horizontal above the fence to hide the shed from street. I live in Pacific NW. Do you have any suggestions on a nontoxic evergr...
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