Early autumn, spring, and early summer are the primary seasons to seed, lay sod (turf), plant ‘liners’, or ‘sprig’ new lawns, when the soil is warmer and air cooler. Seeding is the least expensive, and takes longer for the lawn to be established. Aerating just before planting/seeding will promote deeper root growth and will help thicken turf.
Sodding (turfing) provides an almost ‘instant lawn’, and can be planted in most temperate climates in any season, but is more expensive and more vulnerable to drought until established. Hydroseeding is a quick, less expensive method of planting large, sloped or hillside landscapes. Some grasses and sedges are available and planted from ‘liner’ and 4-inch (100 mm) containers, from ‘flats’, ‘plugs’ or ‘sprigs’, and are planted apart to grow together.