Canada
Lawn care, timed to your weather
Specific answers to the timing questions that decide whether a lawn thrives: when to fertilize, how short to mow, when to overseed and when to leave it alone. Written for your climate, from the same rules the What a Green Lawn app checks against your forecast every day.
How the app works
- Add your lawn. Draw it on the map and the app works out its size, so product amounts match your yard.
- Every day it scores fertilizing, overseeding and dethatching against your local forecast, and suggests a mowing height for the weather.
- Log what you did. The calendar plans the next job around your grass type and the season.
Guides
Fertilizing
- Lawn Lime and Soil pH in Canada: Test First, Then Decide Grass grows best at pH 6.0 to 7.0. Why Prairie and much of Ontario soil needs no lime, where it helps, how to test, how much to use and when.
- How Much Fertilizer Does Your Lawn Need? Grams per m², Worked Out A Kentucky bluegrass lawn needs about 3.5 g of nitrogen per m² per feeding. How to turn the N-P-K on the bag into kilograms, with a 380 m² Toronto lawn.
- When to Fertilize Your Lawn in Canada: May, Labour Day and Fall Light feeding around Victoria Day, the important ones in September and before the ground freezes. How to pick the actual day from temperature and rain.
Seeding and overseeding
Dethatching and aeration
Mowing
- Mowing Wet Grass: Why to Wait and How to Do It When You Must Why mowing wet grass tears the blades, clogs the deck and ruts soft lawns, how long to wait after rain or dew, and what to change when you have to mow anyway.
- First and Last Mow of the Year in Canada: When to Start and Stop Start mowing in late April or May when the grass grows and the ground is firm. Stop after growth ends in late fall and leave bluegrass at 5 to 6 cm for snow.
- How Short to Mow Grass in Canada: Mowing Height by Season Keep a Kentucky bluegrass lawn at 6 to 8 cm (2.5 to 3 in), raise it in summer heat, never cut more than a third. Mowing height for Canadian lawns.
Watering
Weeds and moss
Planning and lawn records
- How to Measure Your Lawn Size in Square Metres or Feet Split the lawn into rectangles, triangles and circles, add up and subtract beds, or trace it on a satellite map. The area every fertilizer bag asks for.
- Lawn Care Log: What to Track Through a Canadian Season Fertilizer, mowing height, seed, lime and soil pH. What to write down in a lawn care log and how it tells you when the fall feedings are due.
Lawn care by season
- Lawn Care Calendar for Canada: What to Do Month by Month A month-by-month lawn care schedule for Canadian lawns: snowmelt cleanup, first mow, feeding, seeding, dethatching, weed control rules and winter prep.
- Soil Temperature for Lawns in Canada: Seeding, Dethatching, Feeding Grass follows soil temperature, not air temperature. The °C thresholds for seeding, dethatching and the first spring feed in Canada, and how to measure it.