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Ornamental grasses fall into two main groups, evergreen and deciduous. Deciduous grasses need cutting back annually so that they will look their best. Evergreens just require a tidy-up.
Cutting back grass. Image: RHS
Early spring to mid-spring depending on the species.
Deciduous grasses, which turn a golden, straw brown rather than necessarily lose their leaves, need different treatment from those with are evergreen.
Ornamental grasses: dividing
Ornamental grasses: selection
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We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.