Apply fertilizer again 4 to 6 weeks after the first application, but not later in the season. Use an herbicide to kill all plants. Scratch up the soil surface with a rake. Use about half the quantity of seed recommended for a new lawn. Keep moist, and mulch for best results.
Most rapid growth occurs spring, fall.
Plants stop growing during hot summer. Most rapid growth occurs later spring to late summer. Southern grasses are dormant in winter. The germination time depends on variety. Here are some common lawn grasses and their average days to germination.