Pre-emergent Weed Control
Pre-emergents work very well in preventing weed seeds from sprouting and work best in gravel areas. Do not use a pre-emergent if you plan to establish a Bermuda grass lawn by seeding. The same is true in the fall if you overseed your hybrid Bermuda or Bermuda grass lawn - it will prevent the winter rye grass seeds from sprouting! Many pre-emergents are available from your local nursery or home improvement store. Ask the sales staff for assistance if you are unsure which product is a pre-emergent. Apply twice a year in April for summer weeds and September for control of winter weeds.

Never heard of pre-emergents before. Sounds interesting, I’ll have to look in to it.