This genus derives its name from a Greek word meaning thistle, and indeed many of its 230-odd species of annuals, biennials, and perennials are thistle-like, though they belong in the carrot family (Umbelliferae), not among the composites. While they are widely distributed, most of the cultivated species-which are commonly known as sea holly-come from Eurasia and North and South America. The leaves are often lance-shaped or featherlike, and edged with spine-tipped teeth. Strong flower stems, usually branching at the top, carry hemispherical heads of minute flowers backed by spiny bracts that give the head much of its color, often a metallic silver-blue. The roots have long been used medicinally and appear to have anti-inflammatory properties.
CULTIVATION
Hardiness varies with the species. Plant in a sunny position in light very well-drained soil,otherwise position in light very well-drained soil, otherwise roots will not during the winter months. Water well when growing, but otherwise allow to dry off. Propagate species from seed and selected forms from root cuttings or by division in spring.
Top Tip
The long flowering season of sea hollies ensures an enduring and interesting floral display in the garden. They can also be dried successfully for use in dried flower arrangements.
CULTIVATION
Hardiness varies with the species. Plant in a sunny position in light very well-drained soil,otherwise position in light very well-drained soil, otherwise roots will not during the winter months. Water well when growing, but otherwise allow to dry off. Propagate species from seed and selected forms from root cuttings or by division in spring.
Top Tip
The long flowering season of sea hollies ensures an enduring and interesting floral display in the garden. They can also be dried successfully for use in dried flower arrangements.
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