Grows 15-30cm (6-12″) tall, and does best direct sown after last frost. Continue sowing more seeds at two week intervals for a longer blooming period. The flowers are cup-shaped and variably marked in crimson to pink. Do not bury seeds, as they require light to germinate. Clarkia is an extremely easy annual flower to grow, and will perform just as well in patio containers as in the flower border. May self sow.