To grow Dahlias, select a sunny spot with well-drained soil, and dig a 30 cm deep hole. Plant the tuber 10 cm below the soil surface, spacing multiple tubers 45 cm apart, or 90 cm for taller varieties. Water consistently, maintaining moist but not saturated soil and protect new shoots from slug damage with eco-friendly methods. Feed plants during the blooming period with liquid plant food. Provide support for stems which will reach 60-90 cm tall depending on variety. Enjoy spectacular blooms from late summer until first frosts. Cut or deadhead the flowers regularly for a continually flourishing display. Once blooming has finished, cut back foliage before lifting, drying and storing the tubers in peat-free substitute, in a frost-free place until the following spring.