Impatiens walleriana in stunning scarlet, perfect for all your summer bedding. Grow as a HHA - Half hardy annual. Sow in pots or trays on a windowsill or in a greenhouse at approximately 13-18°C (55-65°F). When large enough to handle transfer 5cm (2) apart to small pots. Once they are ready for planting out carefully acclimatise them for outside conditions by placing them outside during day time and bringing in at night for the first 4-5 nights, then plant out once the risk of frosts has passed in May/June.