Dahlia-flowered Giants is probably the most well known and sought after Zinnia and has many different colours. Wonderful in the summer border and a delight in a vase on the table. Suitable for flower beds, borders and groups. Sow in a heated greenhouse (22-25ºC). Prick out and later transplant or plant directly in a seedbed in the garden, allow to grow and then transplant to the final spot.