A Hammett Selection. Delicate soft lavender petals emerge from a solar-yellow centre. An unusual bushy form really makes it stand out. 75 cm tall, 6 cm wide flowers. Dahlias should be planted after the threat of frost has passed and will flower for months from early summer until mid-autumn. Choose a nice sunny spot to plant the tuber as dahlias grow and bloom best in full sun. Select the pack size below.