Bishy Barnabee’s Cottage Garden
Annual Flower Seeds
130 cottage garden seeds, grown and trialled on our Norfolk farm
Growing annual flowers — your questions answered
When should I sow annual flower seeds?
Most half-hardy annuals are sown indoors from late February to April, then transplanted outside once the risk of frost has passed. Hardy annuals can be sown directly outdoors from March onwards, or autumn-sown in September and October for stronger, earlier plants the following year.
What is the difference between hardy and half-hardy annuals?
Hardy annuals (HA) can withstand frost and cold conditions, so they can be sown directly outside or overwintered as young plants. Half-hardy annuals (HHA) need warmth to germinate and are killed by frost, so they are usually started indoors and only planted out after the last spring frost.
Can I sow annual seeds in autumn?
Yes — hardy annuals like cornflowers, larkspur, ammi majus, and sweet peas thrive when autumn-sown. They establish stronger root systems over winter and reward you with bigger plants and earlier flowers the following summer. Sow in modules and overwinter in a cold frame or unheated greenhouse for best results.
Which annuals are best for cut flowers?
For a productive cutting patch, look for varieties with long stems, vase life, and the ability to keep flowering when picked. Cosmos, zinnias, ammi majus, scabious, sweet peas, snapdragons, and cornflowers are all reliable performers. The more you cut, the more they bloom.