RHS Award of Garden Merit

RHS Award of Garden Merit logo

The Award of Garden Merit (AGM) issued by the Royal Hoticultural Society (RHS) helps gardeners find reliable, consistent plants that will provide particularly good value in the garden.The award is granted after trials at the RHS’ garden at Wisley in Surrey and/or assessment at specialist collections or discussion at meetings. There is a set list of criteria that plants have to meet to be deemed worthy of the AGM. For more information on the AGM please visit the RHS Website.

Nursery owner, Tim Fuller, has been involved with judging the trials at RHS Wisley since 2008.

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Iris orientalis

Iris orientalis£5.00

Spuria. AGM A strong upright grower with sword-like leaves and sparkling white flowers with a golden yellow thumb-print to 1m+. Good soil in sun. Takes a while to settle.


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Iris sibirica 'Flight of Butterflies'

Iris sibirica 'Flight of Butterflies'£5.00

AGM A more natural look with clouds of small bright royal blue flowers, the falls more white with heavy blue veining. Good soil, sun. 1m.


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Kniphofia 'Bee's Sunset'

Kniphofia 'Bee's Sunset'£5.50

AGM Neat clumps bearing masses of glowing yellow-orange flower spikes in summer to 80cm. Dark stems add to the effect. Drained but good soil in full sun for best flowers.


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Kniphofia 'Incandesce'

Kniphofia 'Incandesce'£7.00

AGM Splendid flaming spikes of bright coral-orange buds that don't fade as they open until they are going over giving a small cream section at the base of the head. Sun, drained soil. 1m.


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Libertia chilensis

Libertia chilensis£7.00

AGM Clouds of elegant bright white flowers in summer over clumps of stiff, iris-like foliage. Evergreen. Drained, good soil in sun. 50cm.


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Liriope muscari

Liriope muscari£5.00

Clumps of strappy evergreen leaves and spikes of purple flowers in autumn to 30cm. A good form. Decent soil in sun or shade.


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Malus hupehensis

Malus hupehensis£16.00

AGM Stunning crabapple with masses of pinkish flowers that opent o bright white, strongly scented in mid-spring. Followed by bunches of small red fruits and autumn foliage. 4m+.


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Miscanthus sinensis 'Strictus'

Miscanthus sinensis 'Strictus'£8.00

Wide green foliage with horizontal yellow bands. To 1.8m.


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Nasella charruana

Nasella charruana£4.50

AGM An attractive clump forming grass from south America with rich green, narrow, leaves and arching stems holding clusters of red-tinted flowers all summer. Drained soil in sun. 60cm.


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Pelargonium 'Ashby'

Pelargonium 'Ashby'£5.00

TENDER Scented. AGM Chunky foliage and enormous bright pink flowers with darker, near black, feathered markings from early spring through summer. Impressive! 40cm.


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Pelargonium 'Attar of Roses'

Pelargonium 'Attar of Roses'£5.00

TENDER AGM SCENTED One of the best known scented types with deeply divided leaves and heads of smallish pink flowers. The main reason for growing is the scent and flavour of the foliage. 40cm.


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Pelargonium 'Royal Oak'

Pelargonium 'Royal Oak'£5.00

TENDER SCENTED AGM. An upright bushy form with oak-shaped leaves with a strong brown mark in the centre of the young leaves. Pale pink flowers with darker marks. 30cm.


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Pennisetum macrourum

Pennisetum macrourum£7.20

AGM Amazing long tapers of buff flowers to 2.4m from midsummer till the first frosts. Well drained soil in full sun or grow in a large pot and take in for the winter in cold areas.


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Pennisetum villosum

Pennisetum villosum£7.50

Low clumps of greyish foliage and masses of over-the-top creamy caterpillar-like flowers from midsummer till the frosts. Well drained soil in sun. 45cm.


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Phlox x arendsii 'Luc's Lilac'

Phlox x arendsii 'Luc's Lilac'£5.00

Stunning lilac pink flowers in large panicles on strong, upright stems to 1.5m or even more! Self-supporting. Smaller flowers than typical border phlox but the better for it! Good soil in sun.


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Primula 'Lady Greer'

Primula 'Lady Greer'£4.50

AGM. A delightful little primrose hybrid with neat clumps of leaves and masses of light yellow flowers in spring on stems to 20cm. Good soil in light shade.


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Sedum spurium 'Schorbuser Blut'

Sedum spurium 'Schorbuser Blut'£4.50

AGM Low growing mats of reddish foliage and bright purplish flowes in summer. Best in well drained soil and full sun. 15cm.


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Stipa calamagrostis

Stipa calamagrostis£5.00

AGM Clumps of upright stems with mid green leaves to 90cm. Topped with soft plumes of feathery golden buff flowers in late summer. Best in good, drained soil in full sun.


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Stipa calamagrostis 'Algäu'

Stipa calamagrostis 'Algäu'£5.50

AGM An excellent, slightly taller, form of this pretty grass. Golden green flowers turn golden buff from midsummer and hold all winter. 1m. Drained soil in sun.


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Stipa lessingiana

Stipa lessingiana£5.00

Clumps of very fine bright green leaves and wispy pale buff flowers in summer to 70cm. Hardier and a little bigger than the well known Stipa tenuissima. Drained soil in sun.


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Stipa tenuissima

Stipa tenuissima£4.50

AGM Hair-like bright green foliage to 40cm. the flowers fountain up and form a light layer of wispy hair-like material over the top of the foliage. Drained soil in sun.


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Symphyotrichum 'Little Carlow'

Symphyotrichum 'Little Carlow'£6.50

AGM. Clumps of upright, branching stems with masses of lavender flowers in autumn. Dark stems and foliage contrast well. 1m Average soil in sun or part shade.


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Symphyotrichum ericoides 'Pink Cloud'

Symphyotrichum ericoides 'Pink Cloud'£5.00

AGM Bolt upright clumps with fine foliage and clouds of pink flowers in autumn to 75cm. Average soil in sun. Good with autumn grasses.


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Tulbaghia 'Purple Eye'

Tulbaghia 'Purple Eye'£5.00

AGM A compact hybrid with grassy foliage and masses of light lilac pink flowers with darker centres all summer. Maybe hardy in well drained soil in full sun or grow in a pot and take in overwinter. 40cm.


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Vinca minor 'Azurea Flore Pleno'

Vinca minor 'Azurea Flore Pleno'£5.00

Lovely double powder blue flowers in early spring. More clump forming than most forms of this useful evergreen groundcover. 15cm.


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