Where lawn quality is unacceptable, renovation may be necessary. Renovation involves planting grass seed into an existing lawn area, often adding new grass varieties to repair damage or increase tolerance to drought, shade, or wear. Renovation usually isn’t necessary until approximately 20-25% of the lawn is bare or covered with weeds.
Renovation alone will not be sufficient if problems are too severe. Starting a new lawn may be the best option where removal of the existing turf, tilling, adding topsoil, and changing the soil grade are needed. The following conditions may warrant starting over:
- an excessively compacted soil
- greater than 50% weeds or bare soil
- a thatch problem (discussed later) that isn’t corrected by renovation efforts