Bonide MAIZE Weed Preventer - Manual (Page 5)

LAWNS
This product is to be applied to mature lawn areas
having a well developed root mass. Do not apply the
product on newly seeded areas as it may inhibit seeds
from germinating. Wait until after first mowing when root
systems are established. In late summer/early fall, apply
after heat stress has passed. If over-seeding or re-sodding
in the fall, do not apply the product in the fall.
This product may be used up to four times per growing
season.