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.
An ornamental South African perennial, hardy only in the milder parts, but worthy of cool greenhouse culture. It has rosettes of lobed rather coarse leaves, and brilliant orange-scarlet Marguerite-like flower heads, 3-4 in. across, on tall stems. There are now a large number of beautiful hybrid forms between this species and G. viridiflora, with orange, scarlet, soft-pink, creamy-yellow, and intermediate shades of colour. If these were grown in quantity they would very likely realize good prices. At present the chief trade is in the plants and seeds. In the open air the plants should be grown in very warm, sheltered, and sunny spots in a compost of loam and peat and well-rotted manure.