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John,
are root pruning fabrics now available on rolls? I have only seen them sewn into bags for planting trees...and what does root-pruning in the fall accomplish?
I don't like the plastic idea because it isn't a permeable membrane, and I worry that the vine, which is easily 20' long, 4' wide, will be starved for moisture. It is directly under a deck, and adjacent to a concrete pad.
But you guys are right; landscape fabric will allow root penetration.
As for root-pruning and herbicide on the shoots, I try to go organic/IPM, and only use pesticides as a last resort.
Not quite there yet!
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