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List of Award of Garden Merit maples

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The maples belong to the genus Acer, an important group of mainly deciduous trees and shrubs in the family Sapindaceae, which are widely cultivated throughout the temperate northern hemisphere. Some, such as Acer griseum, have ornamental bark; but most are valued in cultivation for their brilliant autumn foliage in shades of yellow, orange and red. A vast number of cultivars have been developed for garden use. The palmate maple Acer palmatum alone has thousands of cultivars, many of which originate in Japan where the plant is especially prized for its compact size and elegant domed shape. Many maple species lend themselves to bonsai treatment.[1]

All tolerate a range of growing conditions, but prefer a partially shaded, sheltered position in soil that is well-drained but also retains moisture. Most are reasonably hardy down to −20 °C (−4 °F) or so. The following is a selected list of cultivars which in the UK have gained the Royal Horticultural Society's Award of Garden Merit (confirmed 2018).[2]

Species Cultivar name Year Ref Autumn colour Height Spread Image
A. campestre 1993 [3] yellow/red 12m 8m
A. cappadocicum 'Aureum' 1993 [4] yellow 12m 8m
A. cappadocicum 'Rubrum' 1993 [5] yellow 12m 8m
A. davidii 'George Forrest' 1993 [6] yellow 12m 8m
A. × freemanii Autumn Blaze='Jeffersred' 2012 [7] orange/red 12m 8m
A. griseum 1993 [8] orange/red 12m 8m
A. japonicum 'Aconitifolium' 1993 [9] red 8m 8m
A. japonicum 'Vitifolium' 1993 [10] red 8m 8m
A. micranthum 2012 [11] orange 8m 4m
A. negundo 'Winter Lightning' 2012 [12] yellow 10m 8m
A. negundo var. violaceum 2012 [13] purple 12m 8m
A. palmatum 'Beni-maiko' 1993 [14] yellow/orange/red 1.5m 1.5m
A. palmatum 'Beni-tsukasa' 1993 [15] orange 2.5m 2.5m
A. palmatum 'Bloodgood' 1993 [16] red 4m 4m
A. palmatum 'Burgundy Lace' 1993 [17] purple 4m 4m
A. palmatum 'Chitose-yama' 1993 [18] red 2.5m 2.5m
A. palmatum 'Crimson Queen' 1993 [19] red/purple 2.5m 2.5m
A. palmatum 'Elegans' 2012 [20] yellow/orange/red 2.5m 2.5m
A. palmatum 'Garnet' 1993 [21] red/purple 1.5m 2.5m
A. palmatum 'Inaba-shidare' 1993 [22] red/purple 2.5m 2.5m
A. palmatum 'Katsura' 2002 [23] orange 4m 4m
A. palmatum 'Orange Dream' 2012 [24] orange/yellow 4m 4m
A. palmatum 'Orangeola' 2012 [25] orange/red 4m 2.5m
A. palmatum 'Ornatum' 2012 [26] red 3m 1.5m
A. palmatum 'Osakazuki' 1993 [27] red/pink 4m 4m
A. palmatum 'Red Pygmy' 1993 [28] red/purple 1.5m 1.5m
A. palmatum 'Sango-kaku' 1993 [29] yellow/red 6m 4m
A. palmatum 'Seiryu' 1993 [30] yellow/orange/red 4m 4m
A. palmatum 'Shin-deshojo' 2012 [31] red/orange 2.5m 2.5m
A. palmatum 'Shish geshira' 2012 [32] orange 4m 2.5m
A. palmatum 'Trompenburg' 2002 [33] orange/red 4m 4m
A. palmatum 'Villa Taranto' 2012 [34] yellow 4m 2.5m
A. platanoides 'Crimson King' 1993 [35] purple/crimson 12m 8m
A. platanoides Princeton Gold='Prigo' 2012 [36] yellow 12m 8m
A. pseudoplatanus 'Brilliantissimum' 1993 [37] pink/green/cream 8m 8m
A. rubrum 'October Glory' 1993 [38] red 12m 8m
A. rubrum Red Sunset='Franksred' 2012 [39] red 12m 8m
A. shirasawanum 'Aureum' 1993 [40] yellow 8m 8m
A. tegmentosum 2012 [41] yellow 12m 8m
A. triflorum 2002 [42] orange 12m 8m

References

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  1. ^ Brickell, Christopher, ed. (2008). The Royal Horticultural Society A-Z Encyclopedia of Garden Plants. United Kingdom: Dorling Kindersley. p. 64. ISBN 9781405332965.
  2. ^ "AGM Plants - Ornamental" (PDF). www.rhs.org. Royal Horticultural Society. November 2018. p. 1. Retrieved 18 February 2019.
  3. ^ "Acer campestre". www.rhs.org. RHS. Retrieved 24 September 2019.
  4. ^ "Acer cappadocicum 'Aureum'". www.rhs.org. RHS. Retrieved 24 September 2019.
  5. ^ "Acer cappadocicum 'Rubrum'". www.rhs.org. RHS. Retrieved 24 September 2019.
  6. ^ "Acer davidii 'George Forrest'". www.rhs.org. RHS. Retrieved 24 September 2019.
  7. ^ "Acer × freemanii 'Jeffersred'". www.rhs.org. RHS. Retrieved 24 September 2019.
  8. ^ "Acer griseum". www.rhs.org. RHS. Retrieved 24 September 2019.
  9. ^ "Acer japonicum 'Aconitifolium'". www.rhs.org. RHS. Retrieved 24 September 2019.
  10. ^ "Acer japonicum 'Vitifolium'". www.rhs.org. RHS. Retrieved 24 September 2019.
  11. ^ "Acer micranthum". www.rhs.org. RHS. Retrieved 24 September 2019.
  12. ^ "Acer negundo 'Winter Lightning'". www.rhs.org. RHS. Retrieved 24 September 2019.
  13. ^ "Acer negundo var. violaceum". www.rhs.org. RHS. Retrieved 24 September 2019.
  14. ^ "Acer palmatum 'Beni-maiko'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  15. ^ "Acer palmatum 'Beni-tsukasa'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  16. ^ "Acer palmatum 'Bloodgood'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  17. ^ "Acer palmatum 'Burgundy Lace'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  18. ^ "Acer palmatum 'Chitose-yama'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  19. ^ "Acer palmatum 'Crimson Queen'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  20. ^ "Acer palmatum 'Elegans'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  21. ^ "Acer palmatum 'Garnet'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  22. ^ "Acer palmatum 'Inaba-shidare'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  23. ^ "Acer palmatum 'Katsura'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  24. ^ "Acer palmatum 'Orange Dream'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  25. ^ "Acer palmatum 'Orangeola'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  26. ^ "Acer palmatum 'Ornatum'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  27. ^ "Acer palmatum 'Osakazuki' (d)". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  28. ^ "Acer palmatum 'Red Pygmy'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  29. ^ "Acer palmatum 'Sango-kaku'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  30. ^ "Acer palmatum 'Seiryu'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  31. ^ "Acer palmatum 'Shin-deshojo'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  32. ^ "Acer palmatum 'Shish geshira'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  33. ^ "Acer palmatum 'Trompenburg'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  34. ^ "Acer palmatum 'Villa Taranto'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  35. ^ "Acer platanoides 'Crimson King'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  36. ^ "Acer platanoides Princeton Gold='Prigo' (PBR)". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  37. ^ "Acer pseudoplatanus 'Brilliantissimum'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  38. ^ "Acer rubrum 'October Glory'". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  39. ^ "Acer rubrum Red Sunset ('Franksred')". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  40. ^ "Acer shirasawanum 'Aureum' (d)". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  41. ^ "Acer tegmentosum". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
  42. ^ "Acer triflorum". Royal Horticultural Society. 2017. Retrieved 24 September 2019.
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