Twisty Baby Locust and septic drain field - Knowledgebase Question

St. Cloud, MN
Question by neeserml
May 15, 2006
I just purchased one of these unique trees and I would like to put it in our front yard, but I am concerned with our septic drain field and the tree's root system. I am planning to position it rather close to the drain field and worried that the roots will cause problems. If this is could be a problem, do you have suggestions of another unique ornamentals that I could use in its place that would have more of a tap root? I would like some fall color (something yellow or orange), small - under 25 feet, unique if possible and hardy to zone 4. Thanks for your help.

Answer from NGA
May 15, 2006


Whether or not the roots of your tree will invade the drain field is really anybody's guess. Tree roots tend to remain in the top 18-24" of soil and radiate out about one and one-half times the diameter of the canopy of the tree. If you plant your Twisty Baby Locust, a variety of dwarf black locust, which grows up to 15 ft wide and tall about 15-20' away from the drain field, it should be fine. Best wishes with your garden!

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