Native Plants
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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.
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Wednesday - September 17, 2014
From: Bartlett, TX
Region: Southwest
Topic: Compost and Mulch, Poisonous Plants, Trees
Title: Is mulch from hackberry and chinaberry trees safe for flowerbeds?
Answered by: Nan Hampton
QUESTION:
We had to remove several large hackberry and china berry trees. Is its mulch safe to use in garden and in flower beds?ANSWER:
Mr. Smarty Plants does NOT recommend mulching with either Celtis laevigata (Sugar hackberry) or Melia azedarach (Chinaberry). Both are considered to be allelopathic—i.e., they release chemicals through their litter and their roots that inhibit the growth of other plant species. You can read the answer to a previous Mr. Smarty Plants question about hackberry allelopathy. Not only is chinaberry allelopathic it is also a seriously invasive species from Asia. Its fruit is poisonous to humans and other mammals and it is allelopathic with leaves and roots that release chemical compounds that inhibit the germination and growth of other plants by raising the pH of the soils. See the answer to a previous question about chinaberry allelopathy.
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