Viewing post #1280428 by greene

Yep, what they said!
I usually take the garden hose and spray the tree in question. I watch where the water runs off to find the 'drip line'. Anything outside the drip line should be no harm to the tree roots. Here on NGA we learn from the experience of other gardeners , so learn from @dyzzypyxxy that you may want to put some type of barrier to exclude tree roots from invading your raised beds.