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Seeding calendar for annual flowers

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Seeding tray
Photo: Lucy Crosbie

The following calendar provides information on planting times for seedlings in the Montréal region.

The number of seeds per gram gives an indication of the size of the seed.

Annual flowers Indoor seeding Time of germination Seeds per gram Remarks
Ageratum
(Ageratum)
Feb / March 5 days 7,000 Cultivate at 18°C
Alyssum
(Loburaria)
March / April 5 days 2,800  
Begonia
(Begonia)
January 2-3 weeks 79,500 Cultivate at 18°C
light for germination
Browallia
(Browallia)
March 10 days 4,000  
Celosia
(Celosia)
March / April 5 days 1,125 Cultivate at 18°C
China aster
(Callistephus)
March / May 8 days 425 Cultivate at 16°C
Cleome
(Cleome)
March / April 7-10 days 425  
Coleus
(Coleus)
Jan / Feb 10 days 3,525 Cultivate at 16°C
French marigold
(Tagetes)
April 15 days 275-350  
Gazania
(Gazania)
Feb / March 10 days 285  
Geranium
(Pelargonium)
February 7-10 days variable Cultivate at 16°  minimum
Impatiens
(Impatiens)
February 15 days 1,400 et +  
Nasturtium
(Tropaeolum)
March / April 8 days 5-10  
Nemesia
(Nemesia)
Feb / March 5-10 days 5,000  
Nicotiana
(Nicotiana)
March 20 days 8,800  
Pansy
(Viola)
January 10 days 750 Cultivate at 7-10°C
Petunia
(Petunia)
Feb / March 10 days 8,800 Cultivate at 10°C
Purslane
(Portulaca)
March 10 days 9,800  
Sage
(Salvia)
March 15 days 250 Cultivate at 13-16°C
Vervain
(Verbena)
March 20 days 350 Germination rate 50%
Zinnia
(Zinnia)
April 10 days 100  

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