Lawn Care Calendar
Month-by-month lawn-care schedule for two grass-type bands: COOL-SEASON Northern Lawn (USDA 3 to 6, NRCan 0 to 5b: Kentucky bluegrass, fine fescue, perennial rye, tall fescue) and WARM-SEASON Southern Lawn (USDA 7 to 10: Bermuda, Zoysia, St. Augustine, Centipede). Tracks aerate, overseed, fertilize (early-spring / late-spring / summer / fall winterizer), pre-emergent, post-emergent, mow, and water-deeply. Fillable check columns for the actual date you did the work.
Pair with the Lawn Fertilizer Calculator to size each feeding and the how to get a beautiful lawn guide for the four pillars. Coordinate weed timing with the Weed Control Calendar and water totals with the Watering Schedule Log.
Lawn Care Calendar
Two-band month-by-month lawn-care schedule. Pick your band (Northern Cool-Season or Southern Warm-Season) and use the right column to log what you actually did.
How to use this calendar
Pick your band (Northern Cool-Season or Southern Warm-Season) using the zone reference below, then follow the month rows for that band. Each month lists the priority tasks; the right column is for the date you actually did the work and any notes. Soil-temperature triggers (50 to 55 F / 10 to 13 C at 4 inch / 10 cm depth) override the calendar in early-spring weeks; if your soil is colder than that, hold pre-emergent until it hits the trigger. Mowing, watering, and pulling are weekly throughout the growing season; the calendar lists the tasks that change month-to-month.
Band reference
| Band | Grass types | USDA zones | NRCan zones | Typical regions |
|---|---|---|---|---|
| Northern / Cool-Season | Kentucky bluegrass, fine fescue, perennial rye, tall fescue | 3, 4, 5, 6 | 0, 1, 2, 3, 4, 5a, 5b | Most populated Canada (Halifax, Montreal, Ottawa, Toronto, Winnipeg, Calgary, Edmonton); Northern US (New England, upper Midwest, Mountain West, Pacific Northwest interior); Alaska; Vancouver / Victoria coastal lawns despite milder climate |
| Southern / Warm-Season | Bermuda, Zoysia, St. Augustine, Centipede | 7, 8, 9, 10 | (rare in Canada outside specialty installs) | US South + Southwest (Atlanta, Dallas, Houston, Phoenix, Florida, southern California) |
Mowing and watering targets
| Target | Cool-Season | Warm-Season |
|---|---|---|
| Mow height (spring / fall) | 3 in (7.5 cm) | 1 to 4 in (2.5 to 10 cm), species-specific |
| Mow height (summer) | 4 in (10 cm) | Same as spring / fall |
| Mow frequency, peak growth | Weekly | Weekly to twice-weekly |
| One-third rule | Never cut more than 1/3 of blade in one mow | Same |
| Water total per week | 1 to 1.5 in (25 to 38 mm) | 1 to 1.5 in (25 to 38 mm) |
| Water schedule | 2 deep sessions | 2 to 3 deep sessions |
| Water time-of-day | 5 to 9 a.m. | 5 to 9 a.m. |
| Annual N target | 3 to 4 lb / 1,000 sq ft (1.5 to 2 kg / 100 m²) | 2 to 4 lb / 1,000 sq ft (1 to 2 kg / 100 m²) |
Cool-Season Northern Lawn: monthly schedule
| Month | Priority tasks | Date done / notes |
|---|---|---|
| January | Plan: order fertilizer + grass seed, sharpen mower blades, service mower, inventory tools. | |
| February | Inventory check: pre-emergent in hand, soil thermometer ready. Stay off frosty grass. | |
| March | Late month: rake leaf debris, edge beds when ground thaws. Start checking soil temp at 4 in (10 cm) depth. | |
| April | Watch forsythia bloom. When soil hits 50 to 55 F (10 to 13 C): apply pre-emergent (corn gluten or chemical, where legal). First mow at 3 in (7.5 cm) when grass is 4 in (10 cm) tall. Light fertilizer feeding (24-0-6, 0.75 lb N / 1,000 sq ft) after first mow. | |
| May | Late spring fertilizer feeding (20-0-8, 1.0 lb N / 1,000 sq ft), 6 to 8 weeks after early-spring feed. Spot-treat broadleaf weeds (manual dig or selective herbicide where legal). Edge beds. Mowing weekly at 3 in (7.5 cm). | |
| June | Raise mow height to 4 in (10 cm) for summer shade-out. Water deep twice a week. Pull crabgrass before it tillers; manual on dandelion taproots after rain. | |
| July | Heat-of-summer maintenance. Skip fertilizer on rain-fed lawns; cool-season is dormant. Half-rate (15-0-15, 0.5 lb N) on irrigated lawns only. Water deep twice a week (1.5 in / 38 mm total). Mow at 4 in (10 cm). | |
| August | Late month: aerate compacted soil (every 2 to 3 years). Plan overseeding. Pull seed-bearing weeds before they finish. Mowing at 4 in (10 cm). | |
| September | Prime overseeding window. Overseed bare patches and thin areas at 5 to 10 lb seed per 1,000 sq ft (2.5 to 5 kg per 100 m²). Light water twice daily for 14 days until germination. Drop mow height back to 3 in (7.5 cm). | |
| October | Fall winterizer fertilizer (13-0-26, 1.0 to 1.25 lb N / 1,000 sq ft) 4 to 6 weeks before first frost. The most important feeding of the year. Final mow at 2.5 in (6 cm) before snow. Continue raking or mulch-mowing leaves before they mat. | |
| November | Last leaf cleanup. Drain hoses and store sprinklers. Service the mower (oil change, blade sharpen, fuel stabilizer). Late-zone Canadian coastal: fall winterizer if not yet applied. | |
| December | Off-season. Avoid foot traffic on dormant turf. Review notes column. Update next-year plan. Inventory tools. |
Warm-Season Southern Lawn: monthly schedule
| Month | Priority tasks | Date done / notes |
|---|---|---|
| January | Mower service. Late month: start checking soil temp at 4 in (10 cm) depth (Southern band warms early). Inventory pre-emergent. | |
| February | Soil-temp window opens: when 50 to 55 F (10 to 13 C) reached, apply pre-emergent (corn gluten or chemical, where legal). Pull early winter annuals. Do not fertilize, lawn is still dormant. | |
| March | Crabgrass germination is active; second pre-emergent application 4 to 6 weeks after first if using corn gluten. Spot-treat broadleaf weeds. Edge beds. Mow at species low height as green-up begins. | |
| April | Watch for full green-up (2 to 3 weeks after last frost). Do not fertilize until lawn is uniformly green. Mow weekly at species-specific height. Water deep twice a week. | |
| May | Late spring fertilizer feeding (28-0-3, 1.0 lb N / 1,000 sq ft) after full green-up. The strongest feeding of the year for warm-season. Water in within 24 hours. | |
| June | Mid-summer maintenance. Pull bermuda runners and nutsedge weekly. Water deep twice a week. Mowing weekly at species height. | |
| July | Mid-summer fertilizer feeding (24-0-12, 0.75 to 1.0 lb N / 1,000 sq ft) at peak growth. Vinegar or boiling water effective on patio cracks. Mow at species height. | |
| August | Late-summer rest period for some weeds. Plan fall pre-emergent for winter annuals. Pull seed-bearing summer weeds before they finish. | |
| September | Soil cooling toward fall pre-emergent window: when soil drops below 70 F (21 C), apply fall pre-emergent for winter annual prevention (where legal). Aerate every 2 to 3 years. | |
| October | Fall potash feeding (0-0-25, 0.5 lb K / 1,000 sq ft) 6 to 8 weeks before first frost. NEVER nitrogen at this point on warm-season. Optional perennial rye overseeding for winter green color (if Bermuda or Zoysia goes brown). | |
| November | Lawn entering dormancy in upper-zone-7 areas. Last mow at species low height. Continued winter-annual prevention: pull as germinating, refresh mulch on bed edges. | |
| December | Lawn dormant brown. Avoid traffic on dormant turf. Sharpen blades. Off-season planning: review notes column, source spring fertilizer, prep for January start. |
Quick triggers
| Trigger | Threshold | What to do |
|---|---|---|
| Soil temp at 4 in (10 cm) | 50 to 55 F (10 to 13 C) | |
| Forsythia full bloom | Visual cue | |
| Cool-season first mow | Grass at 4 in (10 cm) | |
| Warm-season green-up | 2 to 3 weeks after last frost | |
| First-frost approaching (cool-season) | 4 to 6 weeks out | |
| First-frost approaching (warm-season) | 6 to 8 weeks out | |
| Soil temp dropping in fall (warm-season) | Below 70 F (21 C) |
Fertilizer feeding log
| Feeding | Target N (lb / 1,000 sq ft) | N-P-K used | Date applied |
|---|---|---|---|
| Cool-season early spring | 0.75 | ||
| Cool-season late spring | 1.00 | ||
| Cool-season summer (optional) | 0.50 | ||
| Cool-season fall winterizer | 1.00 to 1.25 | ||
| Warm-season late spring | 1.00 | ||
| Warm-season mid-summer | 0.75 to 1.00 | ||
| Warm-season fall potash | 0 (K only, 0-0-25) |
Aeration and overseeding log
| Task | Last done | Next due | Notes |
|---|---|---|---|
| Core aeration | Every 2 to 3 years on heavy-clay lawns | ||
| Overseed (cool-season) | Each fall, late August to mid-September | ||
| Overseed (warm-season rye, optional) | Mid to late October for winter color | ||
| Soil test | Every 3 years, $15 to $25 USD ($20 to $35 CAD) | ||
| Mower blade sharpen | Twice a season | ||
| Lime application (acidic soil) | If soil pH below 6.0 |
Fertilizer ratio reference
| Slot | Common ratio | Why this ratio |
|---|---|---|
| Cool-season early spring | 24-0-6 | Light to moderate N to wake up; minimal P (often restricted); low K |
| Cool-season late spring | 20-0-8 | Full N for peak growth; modest K for stress tolerance |
| Cool-season summer (optional) | 15-0-15 | Half-rate balanced for irrigated lawns; skip on rain-fed |
| Cool-season fall winterizer | 13-0-26 | Full N + high K for cold hardiness; the most important feed of the year |
| Warm-season late spring | 28-0-3 | Heavy N push at green-up; minimal P and K |
| Warm-season mid-summer | 24-0-12 | Sustaining N + K for peak growth |
| Warm-season fall potash | 0-0-25 | K only, no N (N at this point promotes weak growth that winter-kills) |
Year-end notes & observations
Frequently Asked Questions
Which band do I use, Northern (cool-season) or Southern (warm-season)?
Use Northern / Cool-Season if you have Kentucky bluegrass, fescue, perennial rye, or tall fescue. Geographically that covers most populated Canada (Halifax, Montreal, Ottawa, Toronto, Winnipeg, Calgary, Edmonton, most of BC interior), the Northern US (New England, upper Midwest, Mountain West, Pacific Northwest interior), and Alaska. USDA zones 3 to 6, NRCan zones 0 to 5b. Use Southern / Warm-Season if you have Bermuda, Zoysia, St. Augustine, or Centipede. That covers the US South and Southwest (Atlanta, Dallas, Houston, Phoenix, Florida, southern coastal California). USDA zones 7 to 10. The Canadian Pacific coast (Vancouver, Victoria, parts of Vancouver Island, NRCan 7 to 9 by climate) is hardiness-zone warm but most lawns there are still cool-season because the dominant residential grasses installed are perennial rye and fescue. Use the Northern band in that case.
What if I don't know my grass type?
Look at the lawn in early April. If it is green, you are cool-season. If it is brown, you are warm-season. Confirm by leaf shape: Bermuda has narrow blades and visible above-ground runners; Kentucky bluegrass has folded blades with boat-shaped tips; St. Augustine has wide, flat, coarse-textured blades; Zoysia has stiff, prickly blades. Your local cooperative extension service (US) or provincial agronomy office (Canada) identifies samples for free or a small fee.
Can I use this calendar in Quebec, Ontario, or other provinces with cosmetic-pesticide bans?
Yes, the calendar still works. Substitute corn gluten meal in pre-emergent slots (apply at the same soil-temperature trigger). Substitute manual pull or stand-up weeder in post-emergent slots. Use organic fertilizers (Espoma, Milorganite) where the calendar calls for synthetic. Mowing, watering, aeration, and overseeding are unchanged. Five Canadian provinces (Quebec, Ontario, Nova Scotia, New Brunswick, Prince Edward Island) restrict cosmetic-use synthetic herbicides; British Columbia, Alberta, and Manitoba have municipality-level rules. Health Canada PMRA registers all pesticides federally; provincial cosmetic laws are stricter. The schedule is the same; only the active method differs.
What's the soil-temperature trigger for crabgrass pre-emergent?
50 to 55 F (10 to 13 C) at 4 inch (10 cm) depth, before crabgrass seeds germinate. Forsythia full bloom is the visual cue across most of North America. Northern band: typically mid-April to early May. Southern band: typically late February to mid-March. Inexpensive soil thermometers ($10 to $15 USD / $14 to $20 CAD) make this trigger trivial to track. Apply within a 7 to 10 day window after the trigger; later applications miss germinating seeds.