Sow direct where they are to grow as these plants do not transplant well. Scatter seed thinly over soil and barely cover with Yates Seed Raising Mix. Firm down and water with a fine mist spray. Thin crowded seedlings after germination.
Choose a well drained position in full sun but sheltered from the wind. Add compost and Yates Blood & Bone before planting and fertilise regularly with Yates Thrive Soluble Plant Food. Protect from snails and slugs with Yates Blitzem.
Pinch out early buds until the plants have formed good clumps. Remove spent flowers to promote further blooming. Water at base of plant to avoid disease.