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Tree "root barrier" beneath raised beds, woven or non-woven?

last year

I'm building raised beds for veggies this fall using Beltis retaining wall block. I'm also planting several trees very close by. I know I know, but but for various reasons, its happening. And I like to experiment!

I'll put some sort of barrier at the bottom of the beds to at least slow the tree roots, but they will inevitably invade the raised beds. My question is, what provides a better root barrier, woven or non-woven weed fabric? Or is there no difference because these materials aren't designed for this in the first place?

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