I have found, at least in the humid days of summer in GA that weeds do incredibly well growing on top of landscape fabric. Or more specifically they start in the mulch, but then root easily into the fabric. Ants seem to love it under there as well. I had some in a flower bed near my house and pretty much created a breeding den for carpenter ants. The fabric may work better in other climates, but I will not use it again in Atlanta. I put a few layers of newspaper down and cover it with mulch. Then I can til it all under the following Spring. I keep saying I would like to find a wide roll of paper next year, but never do. Papering is a bit annoying to me, but much less than weeding. Garden update: still waiting for my mail order plants, but all others doing very well. Flowers on about eight tomato plants, a zucchini that thinks its midsummer, and the chiles are digging in and growing beautifully. sometimes it all just makes ya smile. take care, Suz