Ornamental plants, mostly bearinglilac or blue flowers. Many of the half-hardy kinds are grown in pots, so that they may the more readily be removed to the greenhouse in winter. The perennials are propagated by dividing the roots. The annuals are increased from seed sown in March or early in April. They like a rich, light soil, and come into bloom in June and July. Height, 1 ft. to 2 ft.
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