This is a genus of tall ground-covering grasses, which can be invasive. They have wide, pointed leaves, which are usually blue or silver in colour.
There are about 40 perennial species, which grow on rocky hillsides and sand dunes across the temperate regions of the northern hemisphere. They are often found in salty or alkaline environments.
They will grow well in full sun or light shade and require well-drained soil.
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