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.
A distinct race of annual carnations easily raised from seed sown in heat in February and March, to flower in the open air in July to August. Seed may also be sown in autumn in cold frames when fully ripe, and after pricking out and being protected in winter may be planted out in May for flowering. About 70 to 80 per cent of the flowers come double, and have white, deep-red, rose, and yellow varieties, the petals being finely toothed on the margins.