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The following is a list of rhododendron cultivars and species which have gained the Royal Horticultural Society's Award of Garden Merit. They are mostly hardy evergreen shrubs with abundant, brilliantly-coloured, trumpet-shaped flowers, often in large spherical trusses. The group known as azaleas are often (but not always) more compact with smaller flowers and leaves, and may be evergreen (subgenus Tsutsuji) or deciduous (subgenus Pentanthera). Most rhododendrons bloom for a short period in late spring (April to May in the temperate Northern Hemisphere). They are seen at their best in a woodland setting with light dappled shade, in humus-rich acid soil.[1]

Maximum dimensions are shown in metres.

name species type colour Height Spread
R. arborescens[2] white/pink 4.0 4.0
R. bureavii[3] pink/white 2.5 2.5
R. calophytum[4] pink (pale) 8.0 8.0
R. davidsonianum[5] pink (pale) 4.0 2.5
R. decorum[6] white 8.0 2.5
R. falconeri[7] white 12.0 4.0
R. fulvum[8] pink 4.0 4.0
R. luteum[9] deciduous azalea yellow 4.0 4.0
R. macabeanum[10] yellow 12.0 12.0
R. makinoi[11] pink 2.5 2.5
R. orbiculare[12] pink (rose) 2.5 2.5
R. pachysanthum[13] pink (pale) 1.5 2.5
R. pseudochrysanthum[14] pink (pale) 2.5 2.5
R. racemosum[15] white/pink 2.5 2.5
R. rex[16] white (cream) 12.0 8.0
R. rex subsp. fictolacteum[17] white (cream) 12.0 8.0
R. rex subsp. rex[18] white or pink 12.0 8.0
R. sinogrande[19] yellow 12.0 8.0
R. viscosum[20] white/pink 2.5 2.5
R. williamsianum[21] pink (rose) 1.5 1.5
'Albert Schweitzer'[22] pink (pale) 4.0 2.5
'Alexander'[23] evergreen azalea orange 0.5 0.5
'Alice'[24] rose pink 2.5 2.5
'Bashful'[25] pink (pale) 1.5 1.5
'Berryrose'[26] deciduous azalea salmon pink 2.5 1.5
'Blaauw's Pink'[27] evergreen azalea salmon pink 1.0 1.0
'Blewbury'[28] white 1.5 1.5
'Blue Danube'[29] evergreen azalea blue (violet) 2.5 1.5
'Blue Peter'[30] blue (violet) 2.5 2.5
'Bouquet de Flore'[31] deciduous azalea pink/yellow 2.5 1.5
'Canzonetta'[32] evergreen azalea rose pink 1.0 1.0
'Cecile'[33] deciduous azalea salmon pink/yellow 2.5 2.5
'Chinese Silver'[34] R. argyrophyllum subsp. nankingense pink 4.0 2.5
'Cilpinense'[35] pink (pale) 1.1 1.1
'Cornell Pink'[36] R. mucronulatum deciduous pink (pale) 2.5 1.5
'Crane'[37] white 1.0 1.0
'Crest'[38] yellow (pale) 4.0 4.0
'Curlew'[39] yellow (pale) 0.5 0.5
'Cynthia'[40] rose-pink 8.0 8.0
'Daviesii'[41] deciduous azalea white/yellow 1.5 1.5
'Dopey'[42] red (crimson) 2.5 2.5
'Dora Amateis'[43] white 1.0 1.0
'Dreamland'[44] pink (pale) 1.5 1.0
'Egret'[45] white 0.5 1.0
'Elisabeth Hobbie'[46] red (crimson) 0.8 0.8
'Elsie Lee'[47] purple 1.0 1.0
'Fabia'[48] orange/pink 2.5 2.5
'Faggeter's Favourite'[49] white/pink 2.5 2.5
'Fantastica'[50] red/white 1.0 1.0
'Fastuosum Flore Pleno'[51] blue 4.0 4.0
'Fireball'[52] deciduous azalea red (scarlet) 2.5 2.5
'Furnivall's Daughter'[53] pink/maroon 4.0 4.0
'Gartendirektor Rieger'[54] pink (pale) 1.5 1.5
'Gibraltar'[55] deciduous azalea yellow/red 1.5 1.5
'Ginny Gee'[56] pink (pale) 0.5 1.0
'Golden Torch'[57] yellow (pale) 1.5 1.5
'Goldkrone'[58] yellow 1.5 1.5
'Gomer Waterer'[59] pink/yellow 2.5 2.5
'Gristede'[60] blue 1.0 1.0
'Hachmann's Marlis'[61] pink (rose) 1.5 1.5
'Hachmann's Polaris'[62] pink (purple) 1.5 1.5
'Hachmann's Porzellan'[63] white/yellow/green 1.5 1.5
'Hino-crimson'[64] evergreen azalea crimson 0.5 0.5
'Hinomayo'[65] pink (pale) 1.0 1.0
'Homebush'[66] deciduous azalea pink 1.5 1.5
'Hotspur Red'[67] deciduous azalea red (scarlet) 1.5 1.5
'Hydon Dawn'[68] pink (pale) 1.5 1.5
'Hydon Hunter'[69] pink (rose) 1.5 1.5
'Johanna'[70] evergreen azalea red (carmine) 1.0 1.0
'Kate Waterer'[71] pink (rose) 2.5 2.5
'Klondyke'[72] deciduous azalea orange/yellow 2.5 2.5
'Kluis Sensation'[73] red (scarlet) 2.5 2.5
'Koichiro Wada'[74] R. yakushimanum pink/white 1.5 1.5
'Lady Clementine Mitford'[75] pink (peach) 2.5 2.5
'Lavender Girl'[76] pink (mauve) 2.5 2.5
'Lem's Cameo'[77] pink/red 2.5 2.5
'Lem's Monarch'[78] pink/white 2.5 2.5
'Loderi King George'[79] pink (pale) 4.0 4.0
'Loderi Pink Diamond'[80] pink (pale) 4.0 4.0
'Loder's White'[81] white 2.5 2.5
'Lord Roberts'[82] red (crimson) 2.5 2.5
'Markeeta's Prize'[83] red (scarlet) 2.5 2.5
'Merganser'[84] yellow (primrose) 1.0 1.0
'Mid-winter'[85] R. dauricum purple 1.5 1.5
'Moerheim'[86] blue (violet) 1.0 1.0
'Mother's Day'[87] evergreen azalea red (crimson) 0.7 0.7
'Mrs A.T. de la Mare'[88] white 2.5 2.5
'Mrs Charles E. Pearson'[89] pink (pale) 4.0 2.5
'Mrs Furnivall'[90] pink (rose) 2.5 2.5
'Mrs T.H. Lowinsky'[91] white/orange 2.5 2.5
'Myrtilloides Group'[92] R. campylogynum lavender pink 0.5 0.5
'Nancy Evans'[93] yellow 1.5 1.5
'Nancy Waterer'[94] yellow 2.5 2.5
'Narcissiflorum'[95] deciduous azalea yellow 2.5 2.5
'Niagara'[96] evergreen azalea white 0.6 0.6
'Olga'[97] yellow/pink 1.5 1.5
'Openwood'[98] R. yunnanense semi-evergreen pink (pale) 8.0 4.0
'Palestrina'[99] evergreen azalea white 1.5 1.0
'Panda'[100] yellow/pink 1.5 1.5
'Patty Bee'[101] yellow (pale) 1.0 1.0
'Penheale Blue'[102] yellow (pale) 1.0 1.0
'Percy Wiseman'[103] white (cream) 2.5 2.5
'Persil'[104] deciduous azalea white/yellow 2.5 1.5
'Pink Cherub'[105] pink 1.5 1.5
'Pink Pancake'[106] pink (salmon) 0.5 1.5
'Praecox'[107] pink (rose) 1.5 1.5
'Princess Anne'[108] yellow (pale) 1.0 1.0
'Ptarmigan'[109] white 0.9 0.9
'Ramapo'[110] purple (violet) 1.0 1.0
'Razorbill'[111] pink (rose) 1.5 1.5
'Renoir'[112] pink (rose) 1.5 1.5
'Rock Rose'[113] R. racemosum pink 1.5 1.5
'Rosata'[114] deciduous azalea pink (rose) 4.0 2.5
'Saint Merryn'[115] blue (violet) 4.0 2.5
'Satan'[116] red (scarlet) 2.5 2.5
'Scarlet Wonder'[117] red (scarlet) 1.5 1.5
'Silver Slipper'[118] white/yellow 2.5 2.5
'Squirrel'[119] evergreen azalea orange 1.0 1.0
'Strawberry Ice'[120] deciduous azalea pink/orange 2.5 2.5
'The Honourable Jean Marie de Montague'[121] red (crimson) 2.5 2.5
'Tidbit'[122] yellow (cream) 1.0 1.5
'Tortoiseshell Wonder'[123] salmon pink 2.5 2.5
'Vintage Rosé'[124] pink (rose) 1.0 1.0
'Vulcan'[125] red (scarlet) 1.5 1.5
'Vuyk's Rosyred'[126] pink (rose) 1.0 1.5
'Vuyk's Scarlet'[127] red (scarlet) 1.0 1.5
'Wee Bee'[128] pink/red 0.5 1.0
'White Lights'[129] white 1.5 1.5
'Yaku Fairy'[130] R. keiskei var. ozawae yellow (lemon) 0.5 1.0

See also[edit]

References[edit]

  1. ^ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1405332965.
  2. ^ "RHS Plant Selector - Rhododendron arborescens". Retrieved 14 February 2020.
  3. ^ "RHS Plant Selector - Rhododendron bureavii". Retrieved 14 February 2020.
  4. ^ "RHS Plant Selector - Rhododendron calophytum". Retrieved 14 February 2020.
  5. ^ "RHS Plant Selector - Rhododendron davidsonianum". Retrieved 14 February 2020.
  6. ^ "RHS Plant Selector - Rhododendron decorum". Retrieved 14 February 2020.
  7. ^ "RHS Plant Selector - Rhododendron falconeri". Retrieved 14 February 2020.
  8. ^ "RHS Plant Selector - Rhododendron fulvum". Retrieved 14 February 2020.
  9. ^ "RHS Plant Selector - Rhododendron luteum". Retrieved 14 February 2020.
  10. ^ "RHS Plant Selector - Rhododendron macabeanum". Retrieved 14 February 2020.
  11. ^ "RHS Plant Selector - Rhododendron makinoi". Retrieved 14 February 2020.
  12. ^ "RHS Plant Selector - Rhododendron orbiculare". Retrieved 14 February 2020.
  13. ^ "RHS Plant Selector - Rhododendron pachysanthum". Retrieved 14 February 2020.
  14. ^ "RHS Plant Selector - Rhododendron pseudochrysanthum". Retrieved 14 February 2020.
  15. ^ "RHS Plant Selector - Rhododendron racemosum". Retrieved 14 February 2020.
  16. ^ "RHS Plant Selector - Rhododendron rex". Retrieved 6 October 2018.
  17. ^ "RHS Plant Selector - Rhododendron rex subsp. fictolacteum". Retrieved 14 February 2020.
  18. ^ "RHS Plant Selector - Rhododendron rex subsp. rex". Retrieved 14 February 2020.
  19. ^ "RHS Plant Selector - Rhododendron sinogrande". Retrieved 14 February 2020.
  20. ^ "RHS Plant Selector - Rhododendron viscosum". Retrieved 14 February 2020.
  21. ^ "RHS Plant Selector - Rhododendron williamsianum". Retrieved 14 February 2020.
  22. ^ "RHS Plant Selector - Rhododendron 'Albert Schweitzer'". Retrieved 19 February 2020.
  23. ^ "RHS Plant Selector - Rhododendron 'Alexander'". Retrieved 19 February 2020.
  24. ^ "RHS Plant Selector - Rhododendron 'Alice'". Retrieved 19 February 2020.
  25. ^ "RHS Plant Selector - Rhododendron 'Bashful'". Retrieved 19 February 2020.
  26. ^ "RHS Plant Selector - Rhododendron 'Berryrose'". Retrieved 19 February 2020.
  27. ^ "RHS Plant Selector - Rhododendron 'Blaauw's Pink'". Retrieved 19 February 2020.
  28. ^ "RHS Plant Selector - Rhododendron 'Blewbury'". Retrieved 19 February 2020.
  29. ^ "RHS Plant Selector - Rhododendron 'Blue Danube'". Retrieved 19 February 2020.
  30. ^ "RHS Plant Selector - Rhododendron 'Blue Peter'". Retrieved 19 February 2020.
  31. ^ "RHS Plant Selector - Rhododendron 'Bouquet de Flore'". Retrieved 19 February 2020.
  32. ^ "RHS Plant Selector - Rhododendron 'Canzonetta'". Retrieved 19 February 2020.
  33. ^ "RHS Plant Selector - Rhododendron 'Cecile'". Retrieved 19 February 2020.
  34. ^ "RHS Plant Selector - Rhododendron argyrophyllum subsp. nankingense 'Chinese Silver'". Retrieved 19 February 2020.
  35. ^ "RHS Plant Selector - Rhododendron 'Cilpinense'". Retrieved 19 February 2020.
  36. ^ "RHS Plant Selector - Rhododendron mucronulatum 'Cornell Pink'". Retrieved 19 February 2020.
  37. ^ "RHS Plant Selector - Rhododendron 'Crane'". Retrieved 19 February 2020.
  38. ^ "RHS Plant Selector - Rhododendron (Hawk Group) 'Crest'". Retrieved 19 February 2020.
  39. ^ "RHS Plant Selector - Rhododendron 'Curlew'". Retrieved 19 February 2020.
  40. ^ "RHS Plant Selector - Rhododendron 'Cynthia'". Retrieved 19 February 2020.
  41. ^ "RHS Plant Selector - Rhododendron 'Cilpinense'". Retrieved 19 February 2020.
  42. ^ "RHS Plant Selector - Rhododendron 'Dopey'". Retrieved 19 February 2020.
  43. ^ "RHS Plant Selector - Rhododendron 'Dora Amateis'". Retrieved 19 February 2020.
  44. ^ "RHS Plant Selector - Rhododendron 'Dreamland'". Retrieved 19 February 2020.
  45. ^ "RHS Plant Selector - Rhododendron 'Egret'". Retrieved 19 February 2020.
  46. ^ "RHS Plant Selector - Rhododendron 'Elisabeth Hobbie'". Retrieved 19 February 2020.
  47. ^ "RHS Plant Selector - Rhododendron 'Elsie Lee'". Retrieved 19 February 2020.
  48. ^ "RHS Plant Selector - Rhododendron (Fabia Group) 'Fabia'". Retrieved 19 February 2020.
  49. ^ "RHS Plant Selector - Rhododendron 'Faggeter's Favourite'". Retrieved 19 February 2020.
  50. ^ "RHS Plant Selector - Rhododendron 'Fantastica'". Retrieved 19 February 2020.
  51. ^ "RHS Plant Selector - Rhododendron 'Fastuosum Flore Pleno'". Retrieved 19 February 2020.
  52. ^ "RHS Plant Selector - Rhododendron 'Fireball'". Retrieved 19 February 2020.
  53. ^ "RHS Plant Selector - Rhododendron 'Furnivall's Daughter'". Retrieved 19 February 2020.
  54. ^ "RHS Plant Selector - Rhododendron 'Gartendirektor Rieger'". Retrieved 19 February 2020.
  55. ^ "RHS Plant Selector - Rhododendron 'Gibraltar'". Retrieved 19 February 2020.
  56. ^ "RHS Plant Selector - Rhododendron 'Ginny Gee'". Retrieved 19 February 2020.
  57. ^ "RHS Plant Selector - Rhododendron 'Golden Torch'". Retrieved 19 February 2020.
  58. ^ "RHS Plant Selector - Rhododendron 'Goldkrone'". Retrieved 19 February 2020.
  59. ^ "RHS Plant Selector - Rhododendron 'Gomer Waterer'". Retrieved 19 February 2020.
  60. ^ "RHS Plant Selector - Rhododendron 'Gristede'". Retrieved 19 February 2020.
  61. ^ "RHS Plant Selector - Rhododendron 'Hachmann's Marlis'". Retrieved 19 February 2020.
  62. ^ "RHS Plant Selector - Rhododendron 'Hachmann's Polaris'". Retrieved 19 February 2020.
  63. ^ "RHS Plant Selector - Rhododendron 'Hachmann's Porzellan'". Retrieved 19 February 2020.
  64. ^ "RHS Plant Selector - Rhododendron 'Hino-Crimson'". Retrieved 19 February 2020.
  65. ^ "RHS Plant Selector - Rhododendron (Obtusum group) 'Hinomayo'". Retrieved 19 February 2020.
  66. ^ "RHS Plant Selector - Rhododendron 'Homebush'". Retrieved 19 February 2020.
  67. ^ "RHS Plant Selector - Rhododendron (Hotspur Group) 'Hotspur Red'". Retrieved 19 February 2020.
  68. ^ "RHS Plant Selector - Rhododendron 'Hydon Dawn'". Retrieved 19 February 2020.
  69. ^ "RHS Plant Selector - Rhododendron 'Hydon Hunter'". Retrieved 19 February 2020.
  70. ^ "RHS Plant Selector - Rhododendron 'Johanna'". Retrieved 19 February 2020.
  71. ^ "RHS Plant Selector - Rhododendron 'Kate Waterer'". Retrieved 19 February 2020.
  72. ^ "RHS Plant Selector - Rhododendron 'Klondyke'". Retrieved 19 February 2020.
  73. ^ "RHS Plant Selector - Rhododendron 'Kluis Sensation'". Retrieved 19 February 2020.
  74. ^ "RHS Plant Selector - Rhododendron yakushimanum 'Koichiro Wada'". Retrieved 19 February 2020.
  75. ^ "RHS Plant Selector - Rhododendron 'Lady Clementine Mitford'". Retrieved 19 February 2020.
  76. ^ "RHS Plant Selector - Rhododendron 'Lavender Girl'". Retrieved 19 February 2020.
  77. ^ "RHS Plant Selector - Rhododendron 'Lem's Cameo'". Retrieved 19 February 2020.
  78. ^ "RHS Plant Selector - Rhododendron 'Lem's Monarch'". Retrieved 19 February 2020.
  79. ^ "RHS Plant Selector - Rhododendron 'Loderi King George'". Retrieved 19 February 2020.
  80. ^ "RHS Plant Selector - Rhododendron 'Loderi Pink Diamond'". Retrieved 19 February 2020.
  81. ^ "RHS Plant Selector - Rhododendron 'Loder's White'". Retrieved 19 February 2020.
  82. ^ "RHS Plant Selector - Rhododendron 'Lord Roberts'". Retrieved 19 February 2020.
  83. ^ "RHS Plant Selector - Rhododendron 'Markeeta's Prize'". Retrieved 19 February 2020.
  84. ^ "RHS Plant Selector - Rhododendron 'Merganser'". Retrieved 19 February 2020.
  85. ^ "RHS Plant Selector - Rhododendron dauricum 'Mid-winter'". Retrieved 19 February 2020.
  86. ^ "RHS Plant Selector - Rhododendron 'Moerheim'". Retrieved 19 February 2020.
  87. ^ "RHS Plant Selector - Rhododendron 'Mother's Day'". Retrieved 19 February 2020.
  88. ^ "RHS Plant Selector - Rhododendron 'Mrs A.T. de la Mare'". Retrieved 19 February 2020.
  89. ^ "RHS Plant Selector - Rhododendron 'Mrs Charles E. Pearson'". Retrieved 19 February 2020.
  90. ^ "RHS Plant Selector - Rhododendron 'Mrs Furnivall'". Retrieved 19 February 2020.
  91. ^ "RHS Plant Selector - Rhododendron 'Mrs T.H. Lowinsky'". Retrieved 23 February 2020.
  92. ^ "RHS Plant Selector - Rhododendron campylogynum 'Myrtilloides Group'". Retrieved 23 February 2020.
  93. ^ "RHS Plant Selector - Rhododendron 'Nancy Evans'". Retrieved 23 February 2020.
  94. ^ "RHS Plant Selector - Rhododendron 'Nancy Waterer'". Retrieved 23 February 2020.
  95. ^ "RHS Plant Selector - Rhododendron 'Narcissiflorum'". Retrieved 23 February 2020.
  96. ^ "RHS Plant Selector - Rhododendron 'Niagara'". Retrieved 23 February 2020.
  97. ^ "RHS Plant Selector - Rhododendron 'Olga'". Retrieved 23 February 2020.
  98. ^ "RHS Plant Selector - Rhododendron yunnanense 'Openwood'". Retrieved 23 February 2020.
  99. ^ "RHS Plant Selector - Rhododendron 'Palestrina' (Vuykiana)". Retrieved 23 February 2020.
  100. ^ "RHS Plant Selector - Rhododendron 'Panda'". Retrieved 23 February 2020.
  101. ^ "RHS Plant Selector - Rhododendron 'Patty Bee'". Retrieved 23 February 2020.
  102. ^ "RHS Plant Selector - Rhododendron 'Penheale Blue'". Retrieved 23 February 2020.
  103. ^ "RHS Plant Selector - Rhododendron 'Percy Wiseman'". Retrieved 23 February 2020.
  104. ^ "RHS Plant Selector - Rhododendron 'Persil'". Retrieved 23 February 2020.
  105. ^ "RHS Plant Selector - Rhododendron 'Pink Cherub'". Retrieved 23 February 2020.
  106. ^ "RHS Plant Selector - Rhododendron 'Pink Pancake'". Retrieved 23 February 2020.
  107. ^ "RHS Plant Selector - Rhododendron 'Praecox'". Retrieved 23 February 2020.
  108. ^ "RHS Plant Selector - Rhododendron 'Princess Anne'". Retrieved 23 February 2020.
  109. ^ "RHS Plant Selector - Rhododendron 'Ptarmigan'". Retrieved 23 February 2020.
  110. ^ "RHS Plant Selector - Rhododendron 'Ramapo'". Retrieved 23 February 2020.
  111. ^ "RHS Plant Selector - Rhododendron 'Razorbill'". Retrieved 23 February 2020.
  112. ^ "RHS Plant Selector - Rhododendron 'Renoir'". Retrieved 23 February 2020.
  113. ^ "RHS Plant Selector - Rhododendron racemosum 'Rock Rose'". Retrieved 23 February 2020.
  114. ^ "RHS Plant Selector - Rhododendron 'Rosata'". Retrieved 23 February 2020.
  115. ^ "RHS Plant Selector - Rhododendron 'Saint Merryn'". Retrieved 23 February 2020.
  116. ^ "RHS Plant Selector - Rhododendron 'Satan'". Retrieved 23 February 2020.
  117. ^ "RHS Plant Selector - Rhododendron 'Scarlet Wonder'". Retrieved 23 February 2020.
  118. ^ "RHS Plant Selector - Rhododendron 'Silver Slipper'". Retrieved 23 February 2020.
  119. ^ "RHS Plant Selector - Rhododendron 'Squirrel'". Retrieved 23 February 2020.
  120. ^ "RHS Plant Selector - Rhododendron 'Strawberry Ice'". Retrieved 23 February 2020.
  121. ^ "RHS Plant Selector - Rhododendron 'The Honourable Jean Marie de Montague'". Retrieved 23 February 2020.
  122. ^ "RHS Plant Selector - Rhododendron 'Tidbit'". Retrieved 23 February 2020.
  123. ^ "RHS Plant Selector - Rhododendron 'Tortoiseshell Wonder'". Retrieved 23 February 2020.
  124. ^ "RHS Plant Selector - Rhododendron 'Vintage Rosé'". Retrieved 23 February 2020.
  125. ^ "RHS Plant Selector - Rhododendron 'Vulcan'". Retrieved 23 February 2020.
  126. ^ "RHS Plant Selector - Rhododendron 'Vuyk's Rosyred'". Retrieved 23 February 2020.
  127. ^ "RHS Plant Selector - Rhododendron 'Vuyk's Scarlet'". Retrieved 23 February 2020.
  128. ^ "RHS Plant Selector - Rhododendron 'Wee Bee'". Retrieved 23 February 2020.
  129. ^ "RHS Plant Selector - Rhododendron 'White Lights'". Retrieved 23 February 2020.
  130. ^ "RHS Plant Selector - Rhododendron keiskei var. ozawae 'Yaku Fairy'". Retrieved 23 February 2020.
source: https://en.wikipedia.org/wiki/List_of_Award_of_Garden_Merit_rhododendrons

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