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 pretty rock plant, 6 in. high, with trailing stems and deep-blue Forget-me-not-like flowers from March to May. The variety alba has white flowers, and later. It likes sandy loam, and is raised from seeds and by division.