"Mike Lyle" wrote
I don't think I'd bother with the weed barrier, quite honestly: I'd
spend the money on more plants. As seasons go by, weeds will grow on
top of the membrane and have to be taken out anyhow. Bulbs will come
through stone chippings as long as the layer isn't too thick; but
nature will try to turn the chippings into soil by rotting leaves and
stuff into them, including the top growth of your bulbs as it dies
down.
Mike.

Too true, we have gravel on a flat concrete roof - I have to weed it from
time to time!
Jenny