into the house foundation or lift the driveway. Hi, I am doing some research into the possibility of building an arbour over my driveway and training a Wisteria macrostachya (blue moon) to trail over it. I will plant it with compost in a clayish (we live on a delta) soil 4 feet from a house foundation and 1 foot away from a cement driveway. It will get June sun from 8:30am-1:00 pm and 4:00pm – 7:00 pm daily. Our water table is only 5 feet down in summer and can be as high as 2 feet in the winter. My concerns: #1 that the plant drips sap on cars below the arbour. #2 that the roots will get into the house foundation or lift the driveway. I picked an American variety because I thought it less evasive. Should I be concerned about the two points above given my planting coordinates & situation? Thanks very much for your help.
Your concerns are legitimate. They have very invasive roots (even the American variety) and upon injury can leak some sap. I would not advise putting it near anything that you don't want destroyed by them.
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