List of Award of Garden Merit magnolias explained

Below is a list of magnolia species and cultivars which currently (2016)[1] hold the Royal Horticultural Society's Award of Garden Merit. Magnolias are shrubs or trees which put on a showy display of tulip-like flowers, often scented, in early to late spring. Many are slow-growing and may take several years to start flowering. They are suitable for cultivation in parks or gardens in temperate regions.[2] M. stellata is suitable for smaller gardens. All are deciduous except for M. grandiflora, which is evergreen. The AGM citation includes a hardiness rating:[3] all of the plants listed here are rated H6 (hardy down to -20 °C to -15 °C) or H5 (hardy down to -15 °C to -10 °C). This is indicated in the column marked H. Nevertheless, magnolias prefer a sheltered spot, and flower buds may be damaged by late frosts. The maximum size (height and spread) is shown in metres.

Listing

Name AGM H Colour Scent Max size h×w Image
M. 'Athene'[4] 2012 H5 white/pink yes 8 × 8
M. 'Caerhays Belle'[5] 2012 H5 pink no 12+ × 8+
M. 'Caerhays Surprise'[6] 2012 H5 pink no 8 × 8
M. campbellii 'Darjeeling' 2012 H4 deep pink/wine no 10 × 4
M. 'Daphne'[7] 2012 H6 pale yellow no 8 × 8
M. David Clulow'[8] 2012 H5 white/pale pink no 8 × 8
M. 'Daybreak' 2012 H6 pink/red yes 10 × 3
M. denudata[9] (yulan) 1993 H6 white yes 12 × 12
M. 'Elizabeth'[10] 1993 H6 pale yellow yes 12 × 8
M. 'Galaxy'[11] 1993 H6 rose-pink no 12 × 8
M. 'George Henry Kern'[12] 2012 H6 pale pink/purple no 4 × 2.5
M. 'Gold Star'[13] 2012 H6 creamy yellow no 8 × 4
M. grandiflora 'Kay Parris'[14] 2012 H5 creamy white yes 8 × 4
M. grandiflora 'Victoria' 2002 H5 white yes 10 × 8
M. 'Heaven Scent'[15] 1993 H6 rose pink yes 12 × 12
M. liliiflora 'Nigra'[16] 1993 H6 red/purple no 4 × 2.5
M. × loebneri 'Donna'[17] 2012 H6 white yes 8 × 8
M. × loebneri 'Leonard Messel'[18] 1993 H6 lilac/pale pink yes 8 × 8
M. × loebneri 'Mag's Pirouette' 2012 H6 white yes 4 × 3
M. × loebneri 'Merrill'[19] 1993 H6 white no 8 × 8
M. × loebneri 'Wildcat' 2012 H6 white no 4 × 3
M. 'Lois'[20] 2012 H6 primrose yellow yes 12 × 8
M. 'Milky Way'[21] 2002 H5 white/pale pink no 8 × 4
M. 'Pegasus' 2012 H6 white/purple no 6 × 6
M. salicifolia 'Wada's Memory'[22] 1993 H6 white yes 12 × 8
M. 'Sayonara'[23] 1993 H5 white/purple no 8 × 4
M. sieboldii 'Colossus'[24] 2012 H6 white/red yes 8 × 8+
M. × soulangeana 'Brozzonii'[25] 1993 H5 white/purple no8 × 8
M. × soulangeana 'Pickard's Schmetterling' 2012 H5 white/purple no 8+ × 8
M. 'Spectrum'[26] 2012 H6 pale pink/purple no 8 × 8
M. sprengeri var. diva 'Burncoose'[27] 2012 H6 purple/white no 12 × 8
M. sprengeri var. diva 'Copeland Court'[28] 2012 H6 bright pink no 8 × 8
M. sprengeri var. diva 'Eric Savill'[29] 2012 H6 bright pink/pale pink no 12 × 8
M. 'Star Wars'[30] 2002 H5 rose pink, double yes 8 × 4
M. stellata 'Centennial'[31] 2012 H6 white/pink yes 2.5 × 4
M. stellata 'Jane Platt'[32] 2012 H6 pale pink yes 2.5 × 4
M. stellata 'Royal Star'[33] 2012 H6 white yes 4 × 4
M. 'Susan'[34] 1993 H6 purple/pink yes 4 × 4
M. 'Sweetheart' 2012 H5 pink yes 6 × 4
M. wilsonii[35] 1993 H6 white/crimson yes 8 × 8
M. 'Yellow Lantern'[36] 2012 H6 pale yellow no 5 × 5

Withdrawn

Name Type Flower colour Dimensions h × w
M. grandiflora 'Exmouth' [37] tree double white 8- × 8-
'Lennei'[38] shrub purple/white 4- × 2.5-
M. obovata[39] tree cream 12- × 8-
'Rustica Rubra'[40] shrub rose-pink 4- × 4-
M. salicifolia[41] tree white, fragrant 8- × 4-
M. stellata[42] shrub white 1.5- × 2.5-
M. stellata 'Water Lily'[43] shrub white 1.5- × 2.5-

Notes and References

  1. Web site: RHS AGM List October 2016 (ornamentals). Royal Horticultural Society . 2017 . 2017-01-15.
  2. Book: RHS A-Z encyclopedia of garden plants. 2008. Dorling Kindersley. United Kingdom. 978-1405332965. 1136.
  3. Web site: RHS hardiness rating. Royal Horticultural Society. 21 Nov 2014.
  4. Web site: Magnolia 'Athene' AGM. Royal Horticultural Society . 2017 . 2017-01-20.
  5. Web site: Magnolia 'Caerhays Belle'. Royal Horticultural Society . 2017 . 2017-01-20.
  6. Web site: Magnolia 'Caerhays Surprise' AGM. Royal Horticultural Society . 2017 . 2017-01-20.
  7. Web site: Magnolia 'Daphne' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  8. Web site: Magnolia 'David Clulow' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  9. Web site: Magnolia denudata AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  10. Web site: Magnolia 'Elizabeth' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  11. Web site: Magnolia 'Galaxy' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  12. Web site: Magnolia 'George Henry Kern' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  13. Web site: Magnolia 'Gold Star'. Royal Horticultural Society . 2017 . 2017-01-23.
  14. Web site: Magnolia grandiflora 'Kay Parris' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  15. Web site: Magnolia 'Heaven Scent' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  16. Web site: Magnolia liliiflora 'Nigra' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  17. Web site: Magnolia × loebneri 'Donna' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  18. Web site: Magnolia × loebneri 'Leonard Messel' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  19. Web site: Magnolia × loebneri 'Merrill' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  20. Web site: Magnolia 'Lois' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  21. Web site: Magnolia 'Milky Way' AGM . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  22. Web site: Magnolia salicifolia 'Wada's Memory' AGM . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  23. Web site: Magnolia 'Sayonara' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  24. Web site: Magnolia sieboldii 'Colossus' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  25. Web site: Magnolia × soulangeana 'Brozzonii' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  26. Web site: Magnolia 'Spectrum' AGM. Royal Horticultural Society . 2017 . 2020-02-18.
  27. Web site: Magnolia sprengeri var. diva 'Burncoose' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  28. Web site: Magnolia sprengeri var. diva 'Copeland Court' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  29. Web site: Magnolia sprengeri var. diva 'Eric Savill' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  30. Web site: Magnolia 'Star Wars' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  31. Web site: Magnolia stellata 'Centennial' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  32. Web site: Magnolia stellata 'Jane Platt' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  33. Web site: Magnolia stellata 'Royal Star' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  34. Web site: Magnolia 'Susan' AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  35. Web site: Magnolia wilsonii AGM . RHS Plant Selector. Royal Horticultural Society. 2020-02-18.
  36. Web site: Magnolia 'Yellow Lantern' AGM. Royal Horticultural Society . 2017 . 2017-01-23.
  37. http://apps.rhs.org.uk/plantselector/plant?plantid=1221
  38. Web site: Magnolia × soulangeana 'Lennei' . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  39. Web site: Magnolia obovata Thunb. . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  40. Web site: Magnolia × soulangeana 'Rustica Rubra' . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  41. Web site: Magnolia salicifolia . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  42. Web site: Magnolia stellata . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.
  43. Web site: Magnolia stellata 'Water Lily' . RHS Plant Selector. Royal Horticultural Society. 2013-05-19.

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