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Last and first frost dates in Regina

Canada

In Regina the last spring frost usually comes around 14 May and the first autumn frost around 6 October, which leaves about 145 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 24 May to 16 June.

Last spring frostaround 14 May
First autumn frostaround 6 October
Frost-free days145 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 is the last frost in Regina?

The last frost in Regina usually comes around 14 May: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 23 April, while corn waits until 21 May. The first autumn frost follows around 6 October, about 145 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha21 March – 28 June30 April – 7 August21 May – 7 August
Ageratumfrom 8 March—from 24 May
Arugula——sow 23 April – 1 September
Basil8 April – 4 August16 May – 11 September6 June – 11 September
Beet——sow 23 April – 7 August
Bell Pepper17 March – 17 April16 May – 16 June6 June – 16 June
Black-eyed Susanfrom 27 February—from 21 May
Bok Choy26 March – 15 August30 April – 19 September21 May – 19 September
Borage——sow 21 May – 12 August
Broad bean——sow 23 April – 28 June
Broccoli——sow 23 April – 21 June
Brussels Sprouts16 February – 19 May2 April – 3 July23 April – 3 July
Busy Lizziefrom 26 February—from 21 May
Cabbage——sow 23 April – 29 May
Calendula——sow from 23 April
Carrot——sow 23 April – 14 July
Cauliflower19 February – 21 June2 April – 2 August23 April – 2 August
Celeriac12 February – 18 April30 April – 4 July21 May – 4 July
Celery12 February – 28 April30 April – 14 July21 May – 14 July
Celosiafrom 25 Marchfrom 9 Mayfrom 30 May
Chamomile——sow 23 April – 2 August
Chayote1 February – 11 April30 April – 8 July21 May – 8 July
Chickpea——sow 23 April – 18 June
Chicory8 March – 13 July—23 April – 7 August
Chili Pepper17 March – 24 May16 May – 23 July6 June – 23 July
China asterfrom 25 Marchfrom 16 Mayfrom 6 June
Chives——sow 23 April – 24 July
Cilantro——sow 23 April – 3 August
Corn——sow 21 May – 18 June
Corn poppy——sow from 23 April
Cosmosfrom 25 Marchfrom 9 Mayfrom 30 May
Cucumber18 April – 24 June16 May – 22 July6 June – 22 July
Daikon——sow 23 April – 31 July
Delphiniumfrom 2 February—from 23 April
Dill——sow 23 April – 13 August
Edging lobeliafrom 26 February—from 21 May
Eggplant17 March – 17 April16 May – 16 June6 June – 16 June
Florence fennel16 March – 28 June30 April – 12 August21 May – 12 August
Foxglovefrom 15 January—from 23 April
Garden sorrel——sow 23 April – 1 August
Green Beans——sow 30 May – 26 June
Hollyhock——sow from 23 April
Hyssop——sow 23 April – 24 June
Kale——sow 23 April – 26 July
Kiwano1 April – 1 July3 May – 2 August24 May – 2 August
Kohlrabi——sow 23 April – 5 August
Leek22 January – 9 April2 April – 18 June23 April – 18 June
Lemon balm——sow 23 April – 28 July
Lettuce——sow 23 April – 10 August
Lisianthusfrom 5 Januaryfrom 2 Aprilfrom 23 April
Lovage——sow from 23 April
Luffa4 April – 25 April16 May – 6 June6 June – 6 June
Marigoldfrom 19 Marchfrom 30 Aprilfrom 21 May
Marjoram17 March – 13 July—6 June – 11 September
Melon18 April – 11 June16 May – 9 July6 June – 9 July
Microgreens——sow 30 May – 22 September
Moringa24 April – 18 July18 June – 11 September9 July – 11 September
Moss rosefrom 5 March—from 21 May
Mustard greens——sow 23 April – 22 August
Napa cabbage28 March – 23 July30 April – 25 August21 May – 25 August
Nasturtiumfrom 23 Marchfrom 30 Aprilfrom 21 May
Okra4 April – 6 July16 May – 17 August6 June – 17 August
Oregano1 February – 3 July2 April – 1 September23 April – 1 September
Pansyfrom 5 Februaryfrom 2 Aprilfrom 23 April
Parsley——sow 23 April – 22 July
Parsnip——sow 23 April – 10 June
Peanut9 April – 1 June16 May – 8 July6 June – 8 July
Peas——sow 23 April – 24 July
Petuniafrom 14 Marchfrom 16 Mayfrom 6 June
Physalis19 March – 29 May3 May – 13 July24 May – 13 July
Pumpkin4 April – 30 April16 May – 11 June6 June – 11 June
Purple coneflowerfrom 30 January—from 23 April
Radish——sow 23 April – 6 September
Sage12 February – 29 June2 April – 17 August23 April – 17 August
Scarlet sagefrom 12 March—from 24 May
Snapdragonfrom 27 Januaryfrom 2 Aprilfrom 23 April
Soybean——sow 6 June – 18 July
Spinach——sow 23 April – 12 August
Stevia15 March – 20 May3 May – 8 July24 May – 8 July
Stock——sow from 23 April
Sunflower——sow from 30 May
Sweet alyssum——sow from 23 April
Sweet Corn8 April – 13 July30 April – 4 August21 May – 4 August
Sweet peafrom 19 Februaryfrom 2 Aprilfrom 23 April
Sweet William——sow from 23 April
Swiss Chard——sow 23 April – 7 August
Thyme——sow 23 April – 18 June
Tomato12 March – 25 April3 May – 16 June24 May – 16 June
Turnip——sow 23 April – 9 August
Watercress——sow 23 April – 20 August
Watermelon18 April – 30 May16 May – 27 June6 June – 27 June
Zinniafrom 14 Mayfrom 18 Junefrom 9 July
Zucchini25 April – 29 June16 May – 20 July6 June – 20 July

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. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Regina

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 7 days before the last spring frost and 15 °C 10 days after it.

SoilDateAgainst the last spring frost
5 °C29 April15 days earlier
10 °C7 May7 days earlier
15 °C24 May10 days later
18 °C6 June23 days later

Frost dates near Regina

Of the nearest cities on our list, the last spring frost ends earliest in Billings (25 April) and latest in Saskatoon (15 May).

CityDistanceLast spring frostFirst autumn frost
Saskatoon235 km15 May6 October
Bismarck494 km1 May15 October
Winnipeg536 km12 May12 October
Billings594 km25 April14 October
Grand Forks615 km10 May16 October

Seeds, seedlings and markets in Regina

Within 15 km of Regina OpenStreetMap lists 9 garden centres, 1 farm-supply shop, 1 plant nursery and 3 markets (collected 20 October 2026). The nearest garden centre to the city centre is Succulicious Studio, 1 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Regina

Frosts in Regina usually come from about 6 October to about 14 May. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Regina by month

Average weather in Regina over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (20.7–26 °C). Nights average below 0 °C in November–April (-16.4–-2.6 °C). About 443 mm of rain falls in a year, on 80 days; June is the wettest month (74 mm) and February the driest (14 mm).

MonthDay, °CNight, °CRain, mmRainy days
January-6.1-15.1155
February-6.1-16.4144
March1.7-9.3235
April10-2.6306
May19.45.8518
June23.411.57410
July2614.2558
August25.413.2547
September20.78.8406
October10.20.6367
November1-6.5297
December-5.5-13.8227

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

CropWhen to plant
Bearded Irisby 6 September
Crocus6 September – 22 October
Daffodil6 September – 22 October
Garlic6 September – 22 October
Grape hyacinthby 6 September
Helleboreby 6 September
Hyacinth6 September – 22 October
Lilyby 6 September
Ornamental onionby 6 September
Peonyby 6 September
Saffronby 6 September
Snowdropby 6 September
Tulip6 September – 22 October
Wild garlicby 6 September

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).