What to plant this week in Quebec City, QC
With average last frost dates in Quebec City falling around May 12, the ground is still too cold and wet for any outdoor sowing or transplanting this week. Gardeners should focus on finishing all winter hardening chores indoors while protecting early spring seedlings from lingering late snows.
The next 7 days
Quebec City, QCGrowing in Quebec City right now
- Protect young perennials with thick mulch against sudden temperature swings common in our rocky outcrop valleys.
- Delay planting tomatoes and peppers until mid-May to avoid the typical freeze risks associated with our northern zone 4b climate.
- Ensure drainage beds are clear of winter debris before attempting any early soil preparation this spring.
- Monitor snowmelt runoff carefully, as saturated soils on our steep slopes can delay seed germination significantly.
Sow this week
No direct sowing windows open this week.
Transplant this week
Nothing is due to go out this week.
Harvest soon
No harvest windows opening just yet.
Seasonal tips
- Finish all spring soil preparation now so you can move quickly to sowing once temperatures rise above 40°F.
- Apply a layer of mulch over winter-weeded areas to suppress weeds as they begin to push through.
- Review your crop calendar and order seeds or start indoor seedlings for late May planting dates.
Pest & disease watch
- Watch for late-season slugs emerging from overwintered shells as temperatures fluctuate above freezing.
- Check evergreens for winter moth eggs that may hatch early due to unseasonably warm spells.
Watering this week
Hold off on regular watering until the ground thaws and daytime highs consistently reach 50°F to avoid waterlogging frozen roots.
Clean up any remaining debris from last winter's garden now to reduce habitats for overwintering pests before spring planting begins.
Quebec City gardening questions
3Can I start my vegetable seeds indoors this week?
Yes, you can start cool-season crops like peas and lettuce indoors now, but wait until after May 12 before moving them outside.
Is it safe to prune fruit trees in Quebec City right now?
It is generally safe to prune dormant deciduous fruit trees now, provided temperatures remain below freezing for most of the day to prevent sap bleeding.
When should I expect my first harvest from a garden started this spring?
Since our average last frost is May 12 and first frost arrives around October 1, aim for mid-summer harvests for warm-season crops like cucumbers and beans.
Other cities in zone 4b
3See the full zone 4b guide → · Plan your Quebec City garden in SproutGuide →