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 dwarf Mexican Composite is valued for bedding out in summer, and is easily raised from seeds sown early in spring or from cuttings. The fluffy flower-heads vary from pale to very deep blue, but there is also a white-flowered variety. Any good garden soil will suit.