A popular and easy-to-grow plant with bright green foliage, and aptly named vibrant yellow and white flowers. Attractive to bees. RHS Award of Garden Merit winner. Flowers June-September. HA - Hardy annual. Height 15cm (6"). Ideal for beds and borders. Attractive to butterflies. Prefers full sun. Sow the seed thinly direct onto finely raked, moist, warm soil where the plants are to flower, raking the seed into the top 3mm (1⁄8") of soil. Germination 14-21 days. Thin see..