Plant grass seed in southern Ontario by properly sowing the grass seeds and creating future environmental conditions favorable to the growth of grass. Southern Ontario's temperate climate requires hardy grass species that are able to grow quickly in the short spring and summer months and survive harsh winters with temperatures falling well below zero. Such cool season grasses include Kentucky bluegrass, tall fescue, fine fescue, and rye grass varieties. Grass prefers moist, high pH soil and direct sunlight.
Rake the lawn clear of debris using a flexible, metal rake.
Sow the grass by distributing the seeds evenly over the lawn using a fertilizer spreader. Use 2 pounds of seed per 1000 square feet when reseeding a mature lawn or 4 pounds of seed per 1000 square feet when over-seeding a new lawn.
Lightly sprinkle 1/12-inch layer of lawn lime over the seeds using a fertilizer spreader. Lime increases the soil's pH balance.
Cover the seeds and lime with 1/2-inch layer of clean compost or peat moss fertilizer using a spreader. Fertilizer adds minerals and nutrients to the top soil while regulating temperature fluctuations and moisture absorption.
Water the lawn once daily for the first two weeks or until new growth is visible through the top soil.
Trim back adjacent flora to increase sunlight on the lawn using outdoor trimmers.