 The best, as far as weed control goes, that we've found is a product called Manor, M-A-N-O-R. That's the common name. The active ingredient in that is met sulfuron methyl. But if you just Google Manor weed control, you'll find that pretty easily for spraying weeds. Fertilizer, you just don't want to overdo it with St. Augustine. It needs some fertilizer. It does not need a lot of fertilizer.