Overseeding means sowing grass seed directly into an existing lawn to thicken it. In Quebec, late summer and early fall are best: warm soil, cool nights and fewer weeds. Mow short, aerate or rake, spread a thin top-dressing, seed, then keep the soil moist until germination.
The 5-step method
- Mow short so seed reaches the soil.
- Prepare the soil: aeration or vigorous raking.
- Top-dress: about 0.5 to 1 cm of soil or compost.
- Seed with a mix suited to your sun or shade.
- Water lightly and often until it sprouts, then more deeply.
Which seed?
- Kentucky bluegrass: dense and attractive, loves sun, slow to sprout
- Fescues: better in shade and drought
- Perennial ryegrass: sprouts fast, great in mixes for high-traffic areas
For large dead areas, compare sod vs seed. Time it with our calendar.
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General advice for the Montreal area. Follow your municipality’s watering rules.