What to plant this week in Regina, SK
With the average last frost date lingering until May 15, Regina gardeners should treat any unseasonal warmth as a fleeting trick; focus your energy now on harvesting summer staples like Beefsteak tomatoes and Bush beans before the Sep 20 first frost locks them out. This week is also the critical window for sowing Garlic indoors or in cold frames to ensure strong root establishment before winter.
The next 7 days
Regina, SKGrowing in Regina right now
- Regina's heavy clay soils retain moisture well but require extra organic matter to prevent waterlogging during our typical May-June rain pulses; incorporate compost into beds now for summer crops like Sunflowers and Pumpkins.
- The flat prairie terrain offers no windbreaks against the relentless Chinook winds, so protect tender transplants like Garden Verbena and Lisianthus with burlap or row covers immediately if a warm-up triggers unexpected blooms.
- Soil temperatures often lag behind air temps in this zone; wait until late May to sow cool-weather crops like Parsnip and Leek directly to avoid germination failure from residual frost pockets.
Sow this week
1 crops- Garlic
Transplant this week
Nothing is due to go out this week.
Harvest soon
15 crops- Beefsteak Tomato
- Brussels Sprouts
- Bush Bean
- Cosmos
- Dahlia
- Garden Verbena
- Garlic
- Leek
- Lisianthus (Prairie Gentian)
- Ornamental Sweet Potato Vine
- Parsnip
- Potato
- Pumpkin
- Sunflower
- Winter Squash
Seasonal tips
- Finish succession sowings of Bush Beans now that the soil has warmed up significantly.
- Apply a thick layer of straw or leaves around Winter Squash and Pumpkin to protect them from early frosts.
- Prune dead foliage off Cosmos and Dahlia plants immediately after harvesting to keep the garden tidy.
Pest & disease watch
- Cutworms are currently voracious predators on young Bean and Squash seedlings, so inspect stems daily for notching damage.
- Late-season aphids often swarm the undersides of Brussels Sprouts and Tomato foliage as temperatures rise in early summer.
- Powdery mildew thrives in Regina's humid evenings, making regular watering in the morning essential to keep foliage dry on Dahlias and Ornamental Sweet Potato Vines.
Watering this week
Water deeply in the morning to help summer crops finish strong, but reduce frequency as autumn air cools down.
Since Garlic is listed for sowing now, ensure your cloves are firm and free of rot before pushing them into cool soil.
Regina gardening questions
3Can I plant my Garlic cloves outside now?
No, Garlic should be sown indoors or in a cold frame immediately for this week; outdoor planting exposes them to unpredictable frost damage before roots develop. The goal is to get the bulbs established by late May so they can harden off before winter.
My Pumpkins and Winter Squash are blooming but no fruit forms—what's wrong?
This often happens when pollinators haven't emerged due to cool soil, or male flowers have outpaced female blooms in our short season. Hand-pollinate the blossoms with a small brush and ensure your clay-heavy soil is loose enough for root expansion.
Is it safe to harvest my Beefsteak Tomatoes now?
Yes, check daily for ripe fruit, but be ready to ripen green ones indoors by mid-September if another cold snap hits early. Avoid leaving unripe tomatoes on the vine past the first week of September as night lows will halt sugar production.
Other cities in zone 3b
4See the full zone 3b guide → · Plan your Regina garden in SproutGuide →