What to plant this week in Montreal, QC
With the average last frost date here in Montreal set for May 1, this week marks the critical transition from late spring caution to active outdoor planting. Gardeners should keep a close eye on microclimates around Mount Royal and the South Shore, where cold air sinks can delay soil warming even as air temperatures rise.
The next 7 days
Montreal, QCGrowing in Montreal right now
- Focus your efforts on starting Daikon Radish seeds indoors now if you missed the last window for direct sowing in cooler pockets of the city.
- Prepare your garlic planting beds this week by incorporating organic matter to combat Montreal's notoriously heavy, clay-heavy soils that drain poorly in winter and spring.
- Loofah and Roselle (Cranberry Hibiscus) are ready for transplanting immediately into sunny spots on the plateau or terraced gardens where wind exposure is managed.
- Monitor soil moisture carefully; while rainfall patterns shift to drier spells after May 1, the clay subsoil retains water deeply, risking rot if not aerated.
Sow this week
No direct sowing windows open this week.
Transplant this week
Nothing is due to go out this week.
Harvest soon
4 crops- Daikon Radish
- Garlic
- Loofah (Luffa)
- Roselle (Cranberry Hibiscus)
Seasonal tips
- Finish sowing cold-hardy greens now to maximize yields before the soil warms up significantly.
- Prepare raised beds by adding compost ahead of time so they are ready for transplanting in June.
- Plan your succession schedule for tomatoes, peppers, and eggplant to ensure a continuous summer harvest.
Pest & disease watch
- Watch for early aphid colonies forming on new seedlings as temperatures consistently stay above freezing during the day.
- Keep an eye out for spring cankerworms which often emerge in Montreal neighborhoods to strip emerging leaf buds from fruit trees and shrubs.
- Check transplanted garlic for basal rot, a common issue when wet clay soils are mixed with overly aggressive planting depth.
Watering this week
Water deeply and consistently now that the ground has thawed, aiming for about 1 inch per week to encourage strong root establishment.
Apply a light layer of mulch around transplants once they are in the ground to retain moisture as the soil temperature fluctuates.
Montreal gardening questions
3Can I plant my Daikon Radish seeds directly outside now?
It is generally too risky to sow Daikon Radish directly in Montreal this week given the May 1 average last frost date; wait until mid-May or start indoors immediately for a safer head start.
What specific care does Roselle (Cranberry Hibiscus) need when transplanted?
When transplanting your Roselle plants, ensure they are placed in the sunniest available spot to prevent mildew and water deeply but infrequently because our local clay soil holds enough moisture for the roots.
Is it safe to plant Garlic now or should I wait until spring?
This is actually the perfect time to plant garlic cloves in Montreal, as planting now allows them to establish roots before the ground freezes hard in late autumn.
Other cities in zone 5b
8See the full zone 5b guide → · Plan your Montreal garden in SproutGuide →