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Planting trees or gg near retaining wall

Posted by oldschoolboy nc (My Page) on
Wed, Apr 28, 10 at 9:10

I have a 9 foot tall at the highest that fades into the bank at the longest point (top) it is 75'. I would like to plant some Thuja Green Giant at the bottom of the wall to give me a privacy screen from the neighbors. Would the roots or plants themselves affect the retaining wall?

How far away from the wall should I plant tree such as the royal empress tree from driveways, retaining wall, and foundations?

Thank you for your help,
J Reid

Follow-Up Postings:

RE: Planting trees or gg near retaining wall

I don't have a design background like many of the folks here do, but I have dealt with a problem similar to yours. I've planted Thuja Green Giant here and elsewhere, and per the name, they get big very fast. Unless your neighbors are on a hill overlooking your property, the thuja are way more than you need. I don't know how their roots would be when they are large, but I believe there would be a risk they would over time start to lift your wall. An inch would be more than enough to crack it. I imagine the frost line there is not very deep?

How high a privacy screen do you need? If it's just 12-14 feet, there are many shrubs that would work, with essentially no risk to the foundations of any structures. Plain old forsythia would work. Or do you need an evergreen?

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