7 flowers to sow in March – and fill your backyard with blooms in late spring and summer

Sweet peas and other flowers blooming along a rustic fence.

There is a great range of flowers to sow in March to give you fantastic displays of blooms come those warmer days of summer. Annuals, biennials, and perennials can all be started from seed this month.

You can start some of the most popular flowers from seed in March indoors and, if you get the timing right, it should mean that you have healthy young plants ready to put outside into beds, borders, and pots when the frosts have passed.