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R. maximum

Species

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Botanical
Synonyms		 R. ashleyi (Coker)
R. fragrans
R. latifolium (Hoffmanns)
R. maximum var album
R. maximum var purpureum (Pursh)
R. procerum (Salisb.)
R. purpureum (Pursh)
R. purshii (G.Don)
Synonyms R. 'Great Laurel'
R. 'Great Rhododendron'
R. 'Rosebay'
Subgenus Hymenanthes
Section Pontica
Subsection Pontica
Introduced 1763
First Described 1753 ( L. )
Origin E. North America, Georgia to Nova Scotia 0-900 meter
Epiphytic/Terrestrial terrestrial
Mature Wild Height 300 cm. (10ft.)
Bloom Time ?
Flower campanulate
Flower Color white
Fragrance ?
Leaves ovate-lanceolate
Leaf persistence Evergreen
Minimum Hardiness -15 C (5 F)
Additional
Hardiness Info		 H5
R. maximum photo of R. maximum. R. maximum plum pink flowers starting to open.. Location: Rhododendron Species Botanical Garden. Photo by: Thatrhodylady
Title
R. maximum
Photo By
Thatrhodylady
Date Taken
June 27, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
small 648 x 1152, 51 KB medium 1350 x 2400, 221 KB Full 2296 x 4080, 2.5 MB
Description
R. maximum plum pink flowers starting to open.
R. maximum photo of R. maximum. R. maximum flowers and reddish purple midrib on the underside of the leaf.. Location: Rhododendron Species Botanical Garden. Photo by: Thatrhodylady
Title
R. maximum
Photo By
Thatrhodylady
Date Taken
June 27, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
small 648 x 1152, 59 KB medium 1350 x 2400, 239 KB Full 2296 x 4080, 2.7 MB
Description
R. maximum flowers and reddish purple midrib on the underside of the leaf.
R. maximum photo of R. maximum. R. maximum plum pink flowers.. Location: Rhododendron Species Botanical Garden. Photo by: Thatrhodylady
Title
R. maximum
Photo By
Thatrhodylady
Date Taken
June 27, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
small 648 x 1152, 64 KB medium 1350 x 2400, 268 KB Full 2296 x 4080, 2.8 MB
Description
R. maximum plum pink flowers.
maximum photo of R. maximum. Location: Private garden, Diepenveen, Netherlands. Photo by: Coen Zonneveld
Title
maximum
Photo By
Coen Zonneveld
Date Taken
July 7, 2002
Location
Private garden, Diepenveen, Netherlands
License
Copyright, Coen Zonneveld.
Sizes
small medium
maximum photo of R. maximum. maximum red form aka 'Red Max'. Location: Boulderwood, Nova Scotia, Canada. Photo by: Jens Birck
Title
maximum
Photo By
Jens Birck
Date Taken
September 30, 2007
Location
Boulderwood, Nova Scotia, Canada
License
Copyright, Jens Birck.
Sizes
small medium
Description
maximum red form aka 'Red Max'
maximum photo of R. maximum. Location: Private garden, Diepenveen, Netherlands. Photo by: Coen Zonneveld
Title
maximum
Photo By
Coen Zonneveld
Date Taken
June 21, 2009
Location
Private garden, Diepenveen, Netherlands
License
Copyright, Coen Zonneveld.
Sizes
small
maximum photo of R. maximum. maximum 'Leachii'pronounced curly foliage. Location: Private garden on Martha’s Vineyard, MA USA z7. Photo by: Peter Norris
Title
maximum
Photo By
Peter Norris
Date Taken
July 13, 2013
Location
Private garden on Martha’s Vineyard, MA USA z7
License
Copyright, Peter Norris.
Sizes
small medium
Description
maximum 'Leachii'pronounced curly foliage
maximum photo of R. maximum. maximum 'Summertime'. Photo by: Everard Daniel
Title
maximum
Photo By
Everard Daniel
Date Taken
July 2004
Location
License
Copyright, Everard Daniel.
Sizes
small medium
Description
maximum 'Summertime'
maximum photo of R. maximum. maximum 'Independence'. Location: Private garden on Martha’s Vineyard, MA USA z7. Photo by: Peter Norris
Title
maximum
Photo By
Peter Norris
Date Taken
Location
Private garden on Martha’s Vineyard, MA USA z7
License
Copyright, Peter Norris.
Sizes
small medium
Description
maximum 'Independence'