This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
This is a fine showy composite annual from South Africa. It grows 1-1½ ft. high, and produces its rich golden-orange Marguerite-like flower heads, 2½-3 in. across, with a purplish-black centre, in great profusion during the summer months. The seeds should be sown in February and March in gentle heat, afterwards pricking the seedlings out and hardening off for the open air by May. This species has just begun to find its way to market, and is likely to become popular. There are several other species, amongst the best being D. Ecklonis, with pure-white Marguerite-like flower heads, tinged with soft mauve purple outside. D. pluvialis is somewhat similar, but unfortunately the flower heads close in dull weather, or early in the afternoon even in sunny weather.