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

NameAGMHColourScentMax size h×wImage
M. 'Athene'[4] 2012H5white/pinkyes8 × 8
M. 'Caerhays Belle'[5] 2012H5pinkno12+ × 8+
M. 'Caerhays Surprise'[6] 2012H5pinkno8 × 8
M. campbellii 'Darjeeling'2012H4deep pink/wineno10 × 4
M. 'Daphne'[7] 2012H6pale yellowno8 × 8
M. David Clulow'[8] 2012H5white/pale pinkno8 × 8
M. 'Daybreak'2012H6pink/redyes10 × 3
M. denudata[9] (yulan)1993H6whiteyes12 × 12
M. 'Elizabeth'[10]1993H6pale yellowyes12 × 8
M. 'Galaxy'[11]1993H6rose-pinkno12 × 8
M. 'George Henry Kern'[12] 2012H6pale pink/purpleno4 × 2.5
M. 'Gold Star'[13] 2012H6creamy yellowno8 × 4
M. grandiflora 'Kay Parris'[14] 2012H5creamy whiteyes8 × 4
M. grandiflora 'Victoria'2002H5whiteyes10 × 8
M. 'Heaven Scent'[15]1993H6rose pinkyes12 × 12
M. liliiflora 'Nigra'[16]1993H6red/purpleno4 × 2.5
M. × loebneri 'Donna'[17] 2012H6whiteyes8 × 8
M. × loebneri 'Leonard Messel'[18]1993H6lilac/pale pinkyes8 × 8
M. × loebneri 'Mag's Pirouette'2012H6whiteyes4 × 3
M. × loebneri 'Merrill'[19]1993H6whiteno8 × 8
M. × loebneri 'Wildcat'2012H6whiteno4 × 3
M. 'Lois'[20] 2012H6primrose yellowyes12 × 8
M. 'Milky Way'[21]2002H5white/pale pinkno8 × 4
M. 'Pegasus'2012H6white/purpleno6 × 6
M. salicifolia 'Wada's Memory'[22]1993H6whiteyes12 × 8
M. 'Sayonara'[23]1993H5white/purpleno8 × 4
M. sieboldii 'Colossus'[24] 2012H6white/redyes8 × 8+
M. × soulangeana 'Brozzonii'[25]1993H5white/purpleno 8 × 8
M. × soulangeana 'Pickard's Schmetterling'2012H5white/purpleno8+ × 8
M. 'Spectrum'[26] 2012H6pale pink/purpleno8 × 8
M. sprengeri var. diva 'Burncoose'[27] 2012H6purple/whiteno12 × 8
M. sprengeri var. diva 'Copeland Court'[28] 2012H6bright pinkno8 × 8
M. sprengeri var. diva 'Eric Savill'[29] 2012H6bright pink/pale pinkno12 × 8
M. 'Star Wars'[30]2002H5rose pink, doubleyes8 × 4
M. stellata 'Centennial'[31] 2012H6white/pinkyes2.5 × 4
M. stellata 'Jane Platt'[32] 2012H6pale pinkyes2.5 × 4
M. stellata 'Royal Star'[33] 2012H6whiteyes4 × 4
M. 'Susan'[34]1993H6purple/pinkyes4 × 4
M. 'Sweetheart'2012H5pinkyes6 × 4
M. wilsonii[35]1993H6white/crimsonyes8 × 8
M. 'Yellow Lantern'[36] 2012H6pale yellowno5 × 5

Withdrawn

NameTypeFlower colourDimensions h × w
M. grandiflora 'Exmouth' [37]tree fdouble white8–12 m (26–39 ft) × 8–12 m (26–39 ft)
'Lennei'[38]shrub fpurple/white4–8 m (13–26 ft) × 2.5–4 m (8–13 ft)
M. obovata[39]treecream12–15 m (39–49 ft) × 8–12 m (26–39 ft)
'Rustica Rubra'[40]shrub frose-pink4–8 m (13–26 ft) × 4–8 m (13–26 ft)
M. salicifolia[41]treewhite, fragrant8–12 m (26–39 ft) × 4–8 m (13–26 ft)
M. stellata[42]shrubwhite1.5–2.5 m (5–8 ft) × 2.5–4 m (8–13 ft)
M. stellata 'Water Lily'[43]shrubwhite1.5–2.5 m (5–8 ft) × 2.5–4 m (8–13 ft)

References

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