Early and late flower sowing for spring gardens
Garden writers advise timing seeds to soil warmth and frost risk. Hardy annuals like Sweet Alyssum Calendula and Poppies can be sown when soil is dry, while tender annuals such as Zinnia and Aster wait for warmer soil and frost danger to pass. Perennials and bulbs like Gladiolus and Cannas have separate timing, with roses planted early gaining better growth.