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Current search: hardiness: 3[x], soil fertility: barren[x]


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Centaurea

Centaurea (Knapweed, Perennial cornflower)

Centaureas are perennials with purple thistle-like flowers borne throughout summer. Grow centaureas in well-drained soil, even poor soil in full sun. more...


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Echinops

Echinops (Globe thistle)

Echinops are perennial plants with prickly, greyish foliage and rounded, metallic blue flowers heads. Some species may require staking. All types are attractive to butterflies. They require full sun and moderate to poor chalky or sandy soil. more...


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