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.
The double-flowered form (/lore pleno) of this British annual or biennial is the best for market work, the flowers being useful for "cut" during the summer months. They are white, rounded, with a yellowish centre, and remind one of the flower heads of Pyrethrum (or Chrysanthemum) Parthenium (which see). Notwithstanding the name "inodora" the plants have a peculiar scent which is rather against them. The double-flowered form is best propagated from cuttings in September, and wintered in a cold frame. Seeds may also be sown in autumn in cold frames, transplanting the seedlings in March or April.