Flower Seeds to Sow in April

April is a great month for sowing flower seeds, with both hardy and half-hardy annuals ready to go straight into the soil. Sunflowers, calendula, and cosmos can be sown outdoors now, making the most of the warming temperatures. If you prefer to start seeds indoors, try sweet peas, dahlias, and zinnias, giving them a head start before planting out later in the season. For perennial colour, delphiniums, echinacea, and hollyhocks can be sown now, growing strong through summer and blooming in future years. 

How to Grow Flower Seeds in April

April's warming temperatures make it an excellent time to sow flower seeds, whether outdoors or under cover. Direct-sown annuals thrive in well-prepared soil, so rake the surface finely, scatter seeds evenly, and keep the area moist. To stagger blooms, sow in small batches every few weeks. Half-hardy and tender varieties benefit from an indoor start. Sow seeds in trays or pots with moist compost, place them in a bright, warm spot, and transplant them outside once the weather is reliably mild.