Back to blog

Seeding Calendar: The Ultimate Quebec Guide (Dates, Germination & Tips)

Botanix indoor seeding planning calendar

The secret to a productive vegetable garden lies in the precision of your planting schedule. For Quebec gardeners, especially in hardiness zones 3, 4, and 5, every week counts. Get a head start on the season by planning your seeds according to expert recommendations and recognized production standards.

Ready to start your seeds?

Explore our full selection of high-quality seeds and all the equipment you need to succeed this season.

Recommended Reading: Seeding season is back and The Seeding Adventure.

Success in 3 Key Steps

  • Identify your last frost date: Consult this Climate Atlas interactive map to find the exact last spring frost date for your municipality.
  • Use the right soil: Choose a sterile seed-starting mix. Standard garden soil is too compact and increases the risk of fungal diseases like damping-off.
  • Choose the right container: Plants with fragile roots (squash, cucumbers, milkweed) benefit from being sown in peat pots, which can be planted directly into the ground to avoid root shock.

Last frost date map for Quebec cities

Production Calendar: Vegetables

Respecting these periods and container types ensures optimal growth and successful transplanting in June.

Variety Indoor Seeding Germination Suggested Container Transplanting
Eggplant, Ground Cherry Mid-March 8-15 days Tray or Pot Early June
Celery Early March 15-20 days Tray June
Cauliflower, Broccoli, Kale Early April 5-10 days Tray or Pot Mid-May / June
Squash, Pumpkin, Melon Early May 5-10 days Peat Pot Early June
Cucumber Mid-May 5-10 days Peat Pot Early June
Lettuce (early harvest) Mid-April 5-10 days Tray Mid-May
Onion and Leek Late Feb. / Early March 10-15 days Tray Mid-May
Pepper Early March 10-15 days Tray or Pot Early June
Tomato (all types) Late March / Early April 5-10 days Tray or Pot Early June
Young vegetable seedlings growing indoors

Herbs: A Complete Aromatic Garden

Variety Seeding Germination Suggested Container
Rosemary, Mint February 15-25 days Tray
Sage, Thyme, Stevia Mid-March 10-15 days Tray or Pot
Lemongrass March 14-21 days Individual Pot
Chives, Parsley Early April 10-20 days Tray
Basil, Oregano Mid-April 5-10 days Tray or Pot
Coriander, Dill May / June 7-10 days Direct Outdoor Sowing

Flowers: Colours and Pollinators

Variety Indoor Seeding Germination Suggested Container
Begonia, Geranium Jan. / Feb. 5-20 days Tray
Milkweed February 15-20 days Peat Pot
Petunia, Lobelia March 7-12 days Tray
Dahlia and Zinnia Early April 5-10 days Tray or Pot
Cosmos and Marigold Late April 5-10 days Tray or Pot
Sunflower May 6-10 days Peat Pot (or Direct)

Need Personalized Advice?

Every region in Quebec has its own unique characteristics. For advice tailored to your soil and microclimate, visit our experts in-store! Our passionate merchants will be happy to guide you in choosing your seeds and starting equipment.

Find your nearest Botanix garden centre

The Final Step: Hardening Off

One week before planting, gradually acclimatize your plants to outdoor conditions. Place them in the shade for a few hours a day, then gradually increase exposure to sun and wind. This hardening process is essential to ensure your plants thrive after transplanting.

Shop the Seeds and Accessories Collection