Sweet Peas are an old-fashioned flower that both experts and beginners chose for their gardens. They are a good starter flower when learning to grow flowers from seed because their seeds are large, and usually, they germinate easily.  How to Sow: Sow direct in Summer & Autumn at 25mm deep, 15cm apart, Seedling emerge in 2-3 weeks @ 15-18°C. Hardy annual. Support may be needed to protect the plant from unexpected windy conditions. 90-100 days for flowering. September sowings in flowering site 2cm (3.4″) deep. Later sowings in pots 5 seeds in each. October and November sowings in a cold frame. January sowings in a heated glasshouse. March sowings in a cold frame. April sowings direct to flowering site.