Regina Planting Calendar 2026 — Zone 3b Guide

Regina's Growing Season at a Glance

Regina, Saskatchewan sits in Canadian Hardiness Zone 3b — one of the more challenging growing zones in Canada, but also one of the most rewarding once you understand the rhythm of the season. The combination of late spring frosts, hot summers, and long days (up to 16 hours of daylight in June) means Regina gardeners can grow an impressive range of vegetables with the right timing.

Use the frost date calculator at mygardenplanner.ca to get exact frost dates for Regina and calculate seed starting dates for every crop.

Regina Seed Starting Schedule (Indoors)

Because Regina's last frost falls in mid-May, starting long-season crops indoors is essential to making the most of the short growing season.

What to Plant in Regina Month by Month

March — Start the Season Indoors

March is seed-starting month in Regina. Begin with the long-lead crops:

• Onions (from seed): Start in late February or very early March — onions need 10–12 weeks indoors.
• Celery: Start in early March. Celery is slow-growing and benefits from a 12-week head start.
• Peppers: Start in early-to-mid March. Allow 10–12 weeks to transplant size.

Keep seedlings under grow lights 14–16 hours per day or in a bright south-facing window.

April — Tomatoes, Brassicas, and Early Outdoor Seeding

• Tomatoes: Start in mid-March; by April they'll need their first pot-up.
• Brassicas: Start broccoli, cabbage, cauliflower, and kale in late March to early April indoors; harden off to cold frames by late April if mild.
• Direct sow outdoors: Peas, spinach, lettuce, radishes, and carrots can go directly into the garden once the soil is workable — usually mid-April in Regina. These cool-season crops tolerate light frost to -2°C.

May — Transplanting and the Main Garden Season Opens

• Before May 20 (before last frost): Transplant cold-tolerant crops — broccoli, cabbage, lettuce, peas, kale. Use floating row cover for frost protection.
• After May 20 (after last frost): Transplant tomatoes, peppers, squash, and cucumbers. Direct sow corn, beans, sunflowers, and direct-seed cucumbers and squash outdoors.

Victoria Day weekend (third Monday of May) is the traditional safe-to-plant date in Regina for frost-tender crops — but always check the 10-day forecast. Late frosts in the third week of May are not unusual in zone 3b.

June — Peak Planting Season

June is full production mode in Regina. Long days and warming soil mean rapid growth.

• Succession sow lettuce, radishes, and spinach every 2–3 weeks for continuous harvest
• Direct sow beets and turnips in early June
• Side-dress tomatoes and peppers with compost or balanced fertilizer
• Begin succession planting for beans and greens to avoid feast-or-famine harvests

July — Midsummer Maintenance and Fall Planning

• Start fall brassicas: direct sow kale, chard, and broccoli raab in late June to early July for a fall harvest before frost
• Monitor soil moisture — Regina's hot, dry summers can stress crops during heat waves
• Watch for Colorado potato beetle and imported cabbage worm, both common in Saskatchewan

August — Season's End Approaches

• Direct sow fast-maturing fall crops: radishes, arugula, spinach, mâche
• Begin clearing space in beds for garlic (to be planted in late September – early October)
• Watch the 10-day forecast for early frost — zone 3b has seen September 10 frosts in some years

September — Harvest and Garlic Prep

• Harvest winter squash after the skin hardens (usually mid-September)
• Dig potatoes after foliage dies back naturally or at first frost
• Begin garlic planting in late September — see below
• Use floating row covers to extend the season 2–3 weeks for tomatoes and peppers

October — Garlic and Garden Prep

• Plant garlic by early October in Regina. Cloves need time to establish roots before the ground freezes in November. Plant pointed end up, 5–7 cm deep, 15 cm apart, and mulch with 15 cm of straw after temperatures consistently drop below 5°C.
• Spread finished compost over all empty beds
• Cut and compost healthy plant material; bag and discard any diseased tissue

Recommended Varieties for Zone 3b Regina

Short growing seasons require short-season varieties. Always check the days-to-maturity number on the seed packet and choose varieties under the threshold for your zone.

Use MyGardenPlanner.ca for Your Regina Garden

The free planting date calculator at mygardenplanner.ca calculates precise seed starting and transplant dates based on Regina's zone 3b frost dates. Use the full season planner to map every crop from March seed starting through October garlic planting — so nothing gets missed in Regina's short but productive growing season.