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.
Low growing clumps/patches of blue/green leaves with silvery margins. Short stems bearing clusters of apple green flowers which turn rusty-red from spring. 20cm.
syn. Stipa arundinacea - New Zealand Wind Grass. Green foliage tinted orange and red in late summer and autumn. Wispy flowers form a cloud above the foliage in late summer. 1m. Not dry.
Popular form of Wood Anemone for its bright white flowers with a ruff of bright white petalloid stamens giving a near double look. Low growing spring flower for shade and ordinary soil. 15cm.
Listed under both C. hachijoensis and C. oshimensis this plant has a rich green foliage broadly centred creamy yellow. Clump forming to 20cm high and 40cm across. Not dry soil.
A recent introduction from Kurt Bluemel. Dwarf growth to only 1.4m. Steely grey foliage and warm buff flowers from July (rather than October as with other cultivars). Full sun, evergreen.
The Autumn Fern with its perpetual autumn colours. Largish fronds of a paleish green are flushed with bronze, orange and yellow. Easy and colourful. 60cm. Shade, decent soil.
A new shorter growing selection from Piet Oudolf. Solid clumps of purple stained stems and rich green leaves topped with chunky heads of dusky pink flowers. 1.5m. Good soil in sun.
A large herbaceous perennial with chunky green foliage on deep purple stems. Heads of purple/pink flowers in late summer. 1.2m. Average to good soil in sun.
From a compact root, flings out long flowering stems, which will scramble into adjacent shrubs, with black-eyed, magenta saucers. Golden leaves ageing to lime green. 1.5m across, 30cm high. Sun or light shade. May/June into autumn.
AGM A mound of large pale blue flowers veined crimson. 45cm. Flowering June-August onwards. Reasonable soil in open or sunny position. Unique colour for a long flowering plant.
AGM This brilliant hybrid from Cambridge Botanic Garden has intense blue flowers with white centres from May to July and September onwards. Open position in average soil. 60cm x 90cm. Named after a street in Cambridge.
A favourite of many gardeners. Evergreen rosettes overwinter become enlarged by flowering summer stems bearing masses of silvery-pink flowers till the frosts. 15cm by 1m spread. Any drained or dry soil in sun.
Like 'Brookside' but with darker blue flowers, 5cm across. The stuff of myth! Average soil in sun, 70cm. Summer with good repeat and super foliage colour in autumn.
Large showy magenta flowers, dramatically black-centred, are borne on many upward growing stems in summer. A bushy plant whose large leaves provide brilliant autumn colour. 1.2m.
