Planting a Weeping Willow Tree

Minimum: about 3-4 miles. Really, you DON'T want a weeping willow in your yard. Some years ago, when mine got into the sewer line and the septic tank, I called Roto Rooter to clear it. $200 later, I asked how long their work was guaranteed. They told me, "with weeping willow, 6 weeks. Anything else, 6-12 months." A weeping cherry would be quite lovely... Grows slowly, lovely weeping branches; beautiful spring blossoms, few pests, no mess. - Sarsi

Very far. The roots seek out water and will get into septic systems and other watering places. I'd pick another tree if I were you. Good luck!

A lot of people won't plant any kind of tree close to sewer lines or foundations of buildings, etc., because the roots can raise cane with that kind of things, they can crack the foundations and I have a sister who has a lot of trouble with her sewer, because many years before she ever bought her house somebody had planted a tree close to the sewer lines running to house.