Hackberry Tree - Knowledgebase Question

Dimondale, MI
Question by shenrik
July 17, 1998
My neighbor and I each have a strand of identical trees in our backyards and nothing seems to flourish in the flower
beds around them. He says he thinks they are called Hackberry trees (could they be Hawthorne?) and that this type of tree blights the soil around it to eliminate competing plants. Have you ever heard of this type of tree and
what is your solution to our blighted flower beds?

Answer from NGA
July 17, 1998


Neither Hackberry (Celtis) or Hawthorn (Crataegus) are reputed to emit toxins; perhaps you're thinking of the growth inhibiting secretion from walnut trees. If plants struggle to survive beneath large established trees it's generally because the tree's extensive root systems are quick to take up moisture and nutrients, leaving precious little for annuals and perennials. The shade cast by trees can also starve light-loving plants. If you'd like to grow plants beneath a tree's canopy, why not put the plants into containers where they won't have to compete with tree roots? Or build raised beds and line the bottoms with weed-barrier to slow the intrusion of tree roots?

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