GreenlyEdmonton: frost dates
Canada
In Edmonton the last spring frost usually comes around 7 May and the first autumn frost around 6 October, which leaves about 152 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 3 June.
| Last spring frost | around 7 May |
|---|---|
| First autumn frost | around 6 October |
| Frost-free days | 152 days |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Achocha | 14 March | 23 April | 14 May |
| Arugula | — | 26 March | sow 16 April |
| Basil | 29 April | 6 June | 27 June |
| Beet | — | 26 March | sow 16 April |
| Bell Pepper | 24 March | 6 June | 27 June |
| Black-eyed Susan | 13 March | — | 14 May |
| Bok Choy | 19 March | 23 April | 14 May |
| Broad bean | — | 26 March | sow 16 April |
| Broccoli | — | 26 March | sow 16 April |
| Brussels Sprouts | 9 February | 26 March | 16 April |
| Cabbage | — | 26 March | sow 16 April |
| Calendula | — | 26 March | sow 16 April |
| Carrot | — | — | sow 16 April |
| Cauliflower | 12 February | 26 March | 16 April |
| Celeriac | 5 February | 23 April | 14 May |
| Celery | 5 February | 23 April | 14 May |
| Celosia | 31 March | 15 May | 5 June |
| Chamomile | — | 26 March | sow 16 April |
| Chayote | 28 January | 26 April | 17 May |
| Chickpea | — | — | sow 16 April |
| Chili Pepper | 8 April | 21 June | 12 July |
| China aster | 15 April | 6 June | 27 June |
| Chives | — | — | sow 16 April |
| Cilantro | — | 26 March | sow 16 April |
| Corn | — | 26 April | sow 17 May |
| Cosmos | 31 March | 15 May | 5 June |
| Cucumber | 25 April | 6 June | 27 June |
| Daikon | — | 26 March | sow 16 April |
| Delphinium | 16 February | — | 16 April |
| Dill | — | 26 March | sow 16 April |
| Eggplant | 28 March | 6 June | 27 June |
| Florence fennel | 9 March | 23 April | 14 May |
| Garden sorrel | — | 26 March | sow 16 April |
| Green Beans | 20 March | 26 April | 17 May |
| Hyssop | — | — | sow 16 April |
| Kale | — | 26 March | sow 16 April |
| Kiwano | 11 April | 13 May | 3 June |
| Kohlrabi | — | 26 March | sow 16 April |
| Leek | 15 January | 26 March | 16 April |
| Lemon balm | — | 26 March | sow 16 April |
| Lettuce | — | 26 March | sow 16 April |
| Lisianthus | 29 December | 26 March | 16 April |
| Lovage | — | — | sow 16 April |
| Luffa | 25 April | 6 June | 27 June |
| Marigold | 12 March | 23 April | 14 May |
| Melon | 15 April | 6 June | 27 June |
| Microgreens | — | 15 May | sow 5 June |
| Moringa | 27 April | 21 June | 12 July |
| Mustard greens | — | 26 March | sow 16 April |
| Napa cabbage | 21 March | 23 April | 14 May |
| Nasturtium | 16 March | 23 April | 14 May |
| Okra | 25 April | 6 June | 27 June |
| Oregano | 25 January | 26 March | 16 April |
| Pansy | 29 January | 26 March | 16 April |
| Parsley | — | 26 March | sow 16 April |
| Parsnip | — | — | sow 16 April |
| Peanut | 30 April | 6 June | 27 June |
| Peas | — | 26 March | sow 16 April |
| Petunia | 4 April | 6 June | 27 June |
| Physalis | 29 March | 13 May | 3 June |
| Pumpkin | 6 April | 13 May | 3 June |
| Purple coneflower | 13 February | — | 16 April |
| Radish | — | — | sow 16 April |
| Sage | 5 February | 26 March | 16 April |
| Snapdragon | 20 January | 26 March | 16 April |
| Spinach | — | 26 March | sow 16 April |
| Stevia | 25 March | 13 May | 3 June |
| Stock | — | 26 March | sow 16 April |
| Sunflower | — | 15 May | sow 5 June |
| Sweet Corn | — | 26 April | sow 17 May |
| Sweet pea | 12 February | 26 March | 16 April |
| Sweet William | — | — | sow 16 April |
| Swiss Chard | — | 26 March | sow 16 April |
| Thyme | — | 26 March | sow 16 April |
| Tomato | 17 March | 13 May | 3 June |
| Turnip | — | 26 March | sow 16 April |
| Watercress | — | 26 March | sow 16 April |
| Watermelon | 5 May | 6 June | 27 June |
| Zinnia | 17 May | 21 June | 12 July |
| Zucchini | 11 April | 13 May | 3 June |
Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day.
Edmonton: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Planted in autumn
| Crop | Plant around |
|---|---|
| Bearded Iris | 6 September |
| Crocus | 6 September |
| Daffodil | 6 September |
| Garlic | 6 September |
| Hyacinth | 6 September |
| Lily | 6 September |
| Peony | 6 September |
| Saffron | 6 September |
| Tulip | 6 September |
| Wild garlic | 6 September |
A month before the first autumn frost, so the roots grow before winter.