Sow Outside: Perennials: cover seeds. Early autumn to winter.
Spacing: 8 to 12 inches (20 to 30 cm). Start annuals indoors.Sow Inside: Germination time: ten days to two weeks. Temperature 65°F (18°C). Seven or eight weeks in advance. Transplant outdoors three or four weeks after the last frost.
Requirements: Full sunlight. Good drainage. Rich soil. Regular watering (morning/avoid leaves) for best results, though fairly drought tolerant. Deadhead. If growing as a perennial then cut back leaves once flowering has finished. Propagate: cuttings in summer.