Ornamental Grasses
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Out of Stock
£7.99The distinctive black mondo grass forms gradually spreading clumps of highly unusual evergreen strap-shaped black leaves with occasional shiny blue black berries in autumn. Slow but long lived and durable. Sun or part shade. Soil not too wet. Height; 15cm – 25cm.
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£7.99Slowly spreading evergreen carpets of strap like evergreen foliage and occasional spikes of white flower followed by blue berries. Long lived and durable, it makes excellent groundcover in most levels of shade including dry, but will take some sun. Soil not too wet. Height; 15cm – 25cm.
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£7.99Compact evergreen mounds of slowly spreading striking white and green striped leaves. Uncertain origin but very possibly a selection of Ophiopogon planiscapus. Happiest in dry shady conditions. Soil not too wet. Height 15cm – 20cm.
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£12.55A really tall prairie switch grass selected for its comparatively glaucous blue leaves and later forming flowers . Possibly one of the tallest with a generally upright habit. Sunny open spot. Soil not too wet. Height; 2.1m – 2.4m.
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£12.55A tall switch grass selection with foliage of an attractive glaucous grey blue colour. Has a generally upright habit, masses of later appearing tiny flowers and attractive golden autumnal colours. Sunny open spot. Soil not too wet. Height; 2.1m – 2.4m.
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£12.55A most lovely selection of switch grass chosen for its distinctive greyish blue stems, wide leaves, and showy purplish pink tinted flower panicles in high summer. Sunny open spot. Soil not too wet. Height; 1.5m – 1.8m.
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£12.55An excellent selection forming clumps of very upright grey green foliage topped with massed cloud like panicles of tiny purplish flowers during summer. Sunny open spot. Soil not too wet. Height; 1.2m – 1.5m. Deciduous
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£8.55
An excellent selection forming clumps of very upright grey green foliage topped with massed cloud like panicles of tiny purplish flowers during summer. Sunny open spot. Soil not too wet. Height; 1.2m – 1.5m. Deciduous
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£12.99
A new Knoll Gardens selection for autumn 2023. Produces masses of airy pink red flowers supported by generally upright stems and green foliage that develops many shades of wine red and purple as the season progresses. Best in sunny open positions with soil that is not too winter wet. Height 1.2m – 1.5m.
Panicum Merlot, like many a fine wine of the same name, has been some years in the making. For more than a decade Knoll has been trialling seedling selections of the prairie switch grass, Panicum virgatum, with the aim of producing a selection that will not only perform well in the variable UK climate, but which would also offer reliable red toned foliage as well as flower. Following the last few years of final evaluation we are delighted to offer Panicum Merlot to UK gardeners.
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£12.99
An invaluable upright selection having a very distinctive narrow vertical habit and wide greyish green foliage that turns yellowy orange in autumn. Later flowering. Superb vertical accent. Sunny open spot. Soil not too wet. Height; 1.5m – 1.8m.
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£8.55
An invaluable upright selection having a very distinctive narrow vertical habit and wide greyish green foliage that turns yellowy orange in autumn. Later flowering. Superb vertical accent. Sunny open spot. Soil not too wet. Height; 1.5m – 1.8m.
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Out of Stock
£7.99
A very blue ish leaved selection of switch grass forming clumps of striking lax steely blue stems and foliage topped with delicate airy flowerheads. Needs sunny open spot for best effect. Soil not too wet, and is less lax in dry soils. Height; 90cm – 1.2m.
