The white flowers occur in summer in large, conspicuous clusters. These are followed by ribbed, cup-shaped fruits containing the seeds which are dispersed when ripe. This is a hardy plant in a variety of well drained soils. It flowers best in full sun and will withstand moderate frosts once established. The clusters of white flowers make a welcome addition to the garden at a time when flowering of many other plants has ceased.
Propagation is from seed which germinates readily.
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