Soulend,, I don't know about Preen
weed preventer,, that sounds like a pre emergent, meaning,, you apply at the beginning of the season to prevent any
weed seeds from germinating and
growing,
Personally I would not put grass clipping around plants because with grass clippings also come
weed clipping in which
weed seeds would be in as well. And with that comes trouble all over again with the
weeds.
I make my own compost and I
do put grass clippings in it BUT,, I make very sure what ever area I bag mow there are no
weeds .
There are organic
weed killers you can use around veggies and
flowers that won't harm the veggies and
flowers. Maybe you can go to your local nursery and ask them to direct you to an organic product for
weeds while at the same time it's safe keeping for your plants and veggie's!
Oh you can also place mulch around your veggies,, after
weeds are pulled this will help retain moisture as well as keep
weeds down to a minimum, Your local nursery will direct you on the best mulch to use as well.