Canada Fall Lawn Care Schedule: Region-by-Region Dates

Next summer's lawn is decided between mid-August and Thanksgiving. This table puts the four fall jobs — aerate, overseed, feed, grub-treat — on real dates for each region. The rule behind all of them: cool-season grass needs about six weeks of growth before the ground freezes.

Region	Aerate + overseed	Nematodes for grubs	Fall fertilizer	Last mow / cleanup
Prairies (Winnipeg, Saskatoon, Edmonton, Calgary)	Aug 15 – Sep 15	Aug 15 – Sep 5	Early September	Early–mid October
Ontario (Toronto, Ottawa)	Aug 20 – Sep 30	Aug 20 – Sep 15	Mid-September + late-fall feed late Oct	Late October–November
Quebec (Montreal, Quebec City)	Aug 20 – Sep 25	Aug 20 – Sep 10	Mid-September	Late October
Maritimes	Aug 25 – Oct 5	Sep 1 – Sep 20	Late September	Early November
BC South Coast	Sep 1 – Oct 15 (after rains return)	Sep 1 – Oct 1	Early October	November

Notes that save the season

• Order of operations: aerate, then seed the same day — the cores are free seedbeds. Starter fertilizer with the seed; regular fall feed 4-6 weeks later.
• Water-restricted regions: reseed with drought-tolerant blends and micro clover instead of fighting the bylaw next July.
• Grub check first: lift a 30 cm turf flap; 5+ grubs per square foot means nematodes before you invest in seed. Full timing in our beetle & grub guide.
• Last mow: drop to ~5 cm so snow mould has less to work with; mulch the maple leaves right into the turf.

Everything for the window: grass seed & overseeding, drought-tolerant seed, sprinklers and timers — free shipping Canada-wide. Full seeding method: fall overseeding guide.