Spring & Summer

When to Sow Seeds – Annuals

Use the following chart as a reference on when to start your annuals from seed. You can sow seven days on either side of date noted.

Name When to Sow Indoors Days to Germination and Temperature Light and Notes
Ageratum March 24 7 @ 27°C light
Alyssum April 6 5 @ 24°C light, self sows outdoors after one year
Aster April 6 12 @ 21°C any, pinch back in June
Begonia February 24 15 @ 24°C light
Calendula April 6 14 @ 21°C dark, self sows
Candytuft April 6 12 @ 24°C any
Celosia April 13 14 @ 21°C any, resents chilling, use warm water
Clarkia cold tolerant, direct seed June 8-20
Cleome April 6 10 @ 24°C any, self sows
Coleus March 24 10 @ 21°C light, use warm water, pinch at 8″ tall
Cornflower April 6 7 @ 21°C any, use peat pots or direct sow June 8-20
Cosmos April 6 10 @ 24°C light, self sows
Four-o-clock’s April 6 12 @ 24°C any
Geranium February 24 14 @ 24°C any, soak seeds or pre-sprout
Godetia cold tolerant, direct seed June 8-20
Gomphrena March 31 15 @ 27°C dark
Helichrysum April 6 10 @ 21°C light
Heliotrope March 10 20 @ 21°C any
Hollyhock March 24 10 @ 21°C any, self sows
Impatiens March 10 15 @ 24°C light, watch damping off, needs air circulation
Larkspur cold tolerant, direct seed June 8-20
Lavatera March 24 20 @ 21°C any, sow in peat pots
Lobelia March 24 21 @ 24°C light
Marigold April 6 7 @ 24°C any, protect seedlings from slugs
Morning Glory April 27 7 @ 24°C any, soak seeds, use peat pots and put out June 15 or direct sow
Nasturtium April 27 10 @ 24°C dark
Nicotiana March 24 10 @ 21°C light, self sows
Pansy March 10 14 @ 21°C dark, cold tolerant
Petunia March 10 7 @ 27°C light
Poppy cold tolerant, direct seed June 8-20
Portulaca March 31 10 @ 27°C light, self sows
Salvia March 24 12 @ 21°C light
Snapdragon March 24 8 @ 24°C light, cold tolerant, self sows
Stocks April 6 10 @ 18°C light
Sweet Peas April 27 10 @ 18°C any, soak seeds or pre-sprout
Verbena March 24 12 @ 21°C dark
Vinca April 6 8 @ 24°C any
Zinnia April 6 5 @ 21°C any

 

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Shelmerdine Garden Centre Ltd.

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Phone: 204.895.7203
Fax: 204.895.4372
Email: info@shelmerdine.com