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.
There are several species of these graceful plants, with sword-like leaves, grown by nurserymen for border decoration and for cut flowers, the best being A. ramosus, 4-5 ft. high, with spikes of white flowers. Other white-flowered Asphodels are albus, comosus, fistulosus, and sub-alpinus, all about 2 ft. high. A. luteus (or Asphodeline lutea) has yellow flowers, and is popularly known as the "King's Spear". All the kinds mentioned flourish in ordinary garden soil, and may be increased by division in spring or autumn. They flower in summer.