How Close Should a Horse Chestnut Be Safely Planted to a House
I am worried about foundations and roof when the tree is fully grown.
Certified GKH Gardening Expert
You want to give it at least 40 feet of spacing from the house as this will be its potential spread when fully grown. The spread of the canopy in trees reflects the spread of the roots, so if you plan for the canopy, this will also take care of the roots.