Annual flowers also known as English marigolds or pot marigolds.
Season & Zone
Exposure: Full sun to partial shade
Direct sow in early spring (around the end of February on the coast), when light frost is still a possibility and continue to sow until early summer for fall flowers. Calendula is easiest from direct sowing, but can also be started indoors late February to mid-March for transplanting in April. If starting indoors, maintain darkness and a soil temperature of 21°C (70°F) until germination occurs in 6-14 days, and then supply bright light to keep seedlings compact. Or direct sow in early autumn in Zones 8-10.
Sow seeds 5mm (¼") deep, and aim for a spacing of 15-45cm (6-18") between plants.
Calendula grows easily in any regular garden soil, and thrives in a pH range of 5.5-7.0. Pinch back young plants to encourage bushy growth. Occasional feeding is rewarded, but unnecessary. Keep plants watered, but try to avoid overhead watering as plants are susceptible to mildew. Deadhead regularly to prevent self-sowing.