List of Award of Garden Merit maples explained

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 -20C 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
1993 [3] yellow/red 12m 8m
'Aureum' 1993 [4] yellow 12m 8m
A. cappadocicum 'Rubrum' 1993 [5] yellow 12m 8m
'George Forrest' 1993 [6] yellow 12m 8m
='Jeffersred' 2012 [7] orange/red 12m 8m
1993 [8] orange/red 12m 8m
'Aconitifolium' 1993 [9] red 8m 8m
A. japonicum 'Vitifolium' 1993 [10] red 8m 8m
2012 [11] orange 8m 4m
'Winter Lightning' 2012 [12] yellow 10m 8m
A. negundo var. violaceum 2012 [13] purple 12m 8m
'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
'Crimson King' 1993 [35] purple/crimson 12m 8m
A. platanoides ='Prigo' 2012 [36] yellow 12m 8m
'Brilliantissimum' 1993 [37] pink/green/cream 8m 8m
'October Glory' 1993 [38] red 12m 8m
A. rubrum ='Franksred' 2012 [39] red 12m 8m
'Aureum' 1993 [40] yellow 8m 8m
2012 [41] yellow 12m 8m
2002 [42] orange 12m 8m

Notes and References

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

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