Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001237
11/12/99

Rhododendrons - Hardy species and hybrids


'Aglo' - (Mezitt Hybrid) Bright pink flowers with
rusty-red throats. Becomes a 4-foot tall mound but
does grow larger. Provide full sun and an annual
Shearing. Blooms about a week later than P.J.M.,
Zone 4.
'America' - (Yaku Hybrid) - Pink flowers are produced
on a compact plant, Zone 6.
'Anah Kruschke' - A heat tolerant plant with dark
purple flowers, Zone 5.
'Anna H. Hall' - (David Leach Hybrid) - The buds are pink
but open to white flowers. A compact and dense
plant, Zone 6.
'Anna Rose Whitney' - Rose pink flowers with brown
spotting, Zone 6.
'April Reign' - Double, slightly fragrant flowers are
pink with lighter centers, Zone 4.
'April Rose' - The flowers are double, red and slightly
fragrant. The foliage is reddish bronze in the fall,
Zone 4.
'April Snow' - (Mezitt Hybrid) - A dense, upright plant
producing double, pure white flowers, Zone 5.
'April Song' - (Mezitt Hybrid) - Large, light pink
flowers have nearly white inner petals and are
produced on a wide-growing plant, Zone 5.
'April White' - Pure white, semi-double flowers
'Arctic Gold' - (Mezitt Hybrid) - Ivory flowers have
yellow throats, Zone 5.
'Baden-Baden' - Vigorous, sun tolerant plant having a
compact growth habit and cherry red flowers, Zone 5.
'Bali' - (David Leach Hybrid) - Pink flower fade to
white, Zone 5.
'Balta' - (Mezitt Hybrid) - A slow growing, compact
plant that produce pale pink flower buds opening to
nearly white flowers. The flowers will be pinker in
the shade and whitest in the sun, Zone 5.
'Bernstein' - Yellowish orange flowers each with a
bright orange blotch, Zone 5.
'Besse Howells' - (Shammarello Hybrid) - Ruffled red
flowers are produced on a compact plant, Zone 6.
'Big Deal' - A compact plant produces ivory flowers,
Zone 5.
'Big Red' - Large clusters of red flowers are produced
on a wide and upright plant. The foliage is large
and dark green. Best flowering occurs in filtered
sun, Zone 5.
'Black Satin' - (P.J.M. Hybrid) - The flowers are light
violet-purple. The winter foliage color is satiny
black, Zone 5.
'Blue Baron' - A compact, mounded plant that produces
flowers that are almost blue. Winter protection is
suggested, Zone6.
'Blue Diamond' - An early bloomer producing small, blue
flowers, mound-like plant, Zone 6.
'Blue Peter' - Bluish-purple flowers marked with
purple, Zone 5.
'Boule de Neige' - Pale pink buds open to white
flowers. Compact when young but becoming rounded with
age, vigorous and easily grown, Zone 5.
'Bow Bells' - The light pink flowers are darker pink on
the reverse side, a slow grower only 3 feet tall,
Zone 6.
'Burma' - (David Leach Hybrid) - Bright red flowers, Zone
4.
canadense - (Rhodora) - Deciduous, native plant
suitable for use in moist, shaded areas in cool
climates. The plant grows 3 feet tall and produces
lavender pink flowers, Zone 2.
canadense var. albiflorum - Deciduous native species
suitable for use in moist, shaded areas in cool
climates. The plant grows 3 feet tall and produces
white flowers, Zone 2.
'Canary Island' - (David Leach Hybrid) - Yellow
flowers, Zone 5.
carolinianum var. album - Pale pink flower buds open to
very pale pink to white flowers, Zone 5
'Caronella' - (Shrimp Pink Hybrid) -The pink flowers
have darker pink fringes. Most of the foliage falls
in autumn but turns orange yellow and red before
doing so. A vigorous, upright, 5 foot tall plant,
Zone 5.
'Cary's Red' - Red flowers, similar to 'America', Zone
5.
catawbiense - (Catawba Rhododendron) - The flowers will
be in shades of lavender but will vary if plants are
grown from seed, Zone 4.
catawbiense 'Album' - White flowers (Vis. 3) are produced
in large clusters on vigorous and wide plants, Zone 5.
catawbiense 'Album Elegans' - An upright plant
producing flowers (Vis. 2) that open mauve and then
fade to white, Zone 5.
catawbiense 'Album Novum' - The white flowers are
tinted with rose and have greenish-yellow spots, Zone
6.
catawbiense 'America' - Compact clusters of dark red
flowers, Zone 4.
catawbiense 'Amphion' ('F. L. Ames') - Large pink
flowers have white centers, the leaves are unusually
glossy, Zone 5.
catawbiense 'Boursault' - A wide plant that produces
lilac colored flowers (Vis. 4), Zone 5.
catawbiense 'Calsap' - Pale purple flower buds open to
white flowers flushed with purple, Zone 4.
catawbiense 'Chionoides' - A compact, wide plant that
produces white flowers having a yellow eye, Zone 6.
catawbiense 'Cynthia' ('Lord Palmerston') - The flowers
are red with darker markings, a large plant, Zone 6.
catawbiense 'English Roseum' ('Roseum Pink') - The
lilac flowers (Vis. 5) have greenish-yellow blotches in
the throat, Zone 5.
catawbiense 'Everestianum' - A vigorous plant that
blooms well in sun or shade. The flowers (Vis. 6) are
lilac with spots in the throat, Zone 5.
catawbiense 'Grandiflorum' - Pale rose-purple flowers
in large clusters. A vigorous, dense plant, Zone 5.
catawbiense 'Harrisville' - One parent is R.
catawbiense the other is not known. A tall plant
with bright purple flowers having a white upper lobe,
Zone 4.
catawbiense 'Holden' - (Shammarello Hybrid) - The rose
red flowers have red spots, Zone 5.
catawbiense 'Ignatius Sargent' - Large clusters of
deep, rose colored flowers, Zone 4.
catawbiense 'Lee's Dark Purple' - An old cultivar with
purple flowers each with brownish spots, Zone 5.
catawbiense 'Lodestar' ('Swans Down') - The flowers
open pale lilac and then fade to white and are
spotted with greenish yellow, Zone 5.
catawbiense 'Nova Zembla' - Dark red (Vis. 7) flowers
with an even darker center, Zone 5.
catawbiense 'Party Pink' - Light pink flowers become
darker at the edges, Zone 5.
catawbiense 'Powell Glass' - A wide, upright, vigorous
plant that produces white flowers, Zone 5.
catawbiense 'President Lincoln' - A hardy cultivar with
lavender flowers (Vis. 8), Zone 4.
catawbiense 'Purpureum Elegans' -Generally lavender to
pink flowers, Zone 4.
catawbiense 'Purpureum Grandiflorum' - Dark purple
flowers produced somewhat later than normal, Zone 5.
catawbiense 'Ritchie' - The bright purple buds open to
pale purple flowers each edged with dark purple, Zone
4.
catawbiense 'Roseum Elegans' - A vigorous plant with
small, lilac colored flowers (Vis. 9), Zone 5.
catawbiense 'Roseum Superbum' - The pink flowers are
produced in large clusters, Zone 5.
catawbiense 'Spring Parade' - (Shammarello Hybrid) -
Clear red flowers, Zone 5.
catawbiense 'The General' - The red flowers have darker
blotches, Zone 5.
catawbiense 'Vernus' - Pink flowers produced in
profusion, each flower with a darker center, Zone 4.
'Checkmate' - (P.J.M. Hybrid) - The most compact of the
P.J.M. hybrids. It produces small, lavender-pink
flowers, Zone 5.
'Christmas Cheer' - Pink buds open to pink flowers, Zone
6.
'County of York' ('Catalode') - This wide plant
produces large white flowers that have a pale green
throat, Zone 6.
'Crete' - Rose colored buds open to pale purple flowers
each with brown spots, Zone 5.
'Crimson Tide' - Red flowers each with a darker red
spot, Zone 5.
'Cunningham's Blush' - Pale pink flowers with a light
pink blotch, 4 feet tall and 6 feet wide, Zone 5.
'Cunningham's White' - The pink buds open to white
flowers each with a pale yellow center, best in
partial shade, Zone 5
'Daphnoides' - Clusters of purple flowers on 4 to 6
foot tall shrubs, Zone 5.
dauricum var. album - A slow growing plant producing
early, pure white flowers, Zone 5.
dauricum var. sempervirens - The lavender flowers are
produced in early spring. The dark green leaves
persist through the winter, Zone 6.
'Desmit' - A slow growing, compact plant. A ten year
old plant will spread about 3 feet and be 1 foot
tall. The pink flowers are produced in small
clusters, Zone 5.
'Dora Ameteis' - White flowers with yellow throats will
be produced on plants that will be twice as wide as
high, Zone 6.
'Dorothy Swift' - Pale pink to white flowers. A slow-
growing plant that will be wider than high, Zone 6.
'Edmond Amateis' - (David Leach Hybrid) - White flowers
with a red blotch, Zone 6.
'Elite' - (P.J.M. Hybrid) - The latest P.J.M. to
flower. It bears pinkish lavender flowers, Zone 4.
'Elizabeth' - A 3 foot tall mound producing red
flowers, Zone 6.
'Elvira' - (Marjatta Hybrid) - Grows only 2 feet tall and
has red flowers. Zone 4.
'Fiesta' - Pink and white flowers on a compact plant,
Zone 6.
'Fiji' - Red buds open to rose, Zone 5.
'Francesca' - (Dexter Hybrid) - Dark red flowers are
produced in large clusters. A vigorous and upright
plant, Zone 5.
'Fred G. Peste' - A low, 3-foot plant with red flowers,
Zone 4.
'Gertrude Saxe' - Pink flowers are borne in large
clusters. Most foliage is retained in winter, Zone
5.
'Gold Crown' - Lemon yellow flowers spotted with red,
Zone 5.
'Golden Gala' - (David Leach Hybrid) - Ivory colored
flowers are produced on a well-branched plant, Zone
5.
'Gomer Waterer' - Pink buds open to white flowers, 6
foot shrub, Zone 5.
'Haaga' - (Marjatta Hybrid) - Plants about 6 feet tall
produce pink flowers. Cold tolerant, Zone 4.
'Helikki' - (Marjatta Hybrid) - Reddish-violet flowers
are produced on cold tolerant, 6-foot plants, Zone 4.
'Henrietta Sargent' - Rounded plants, about 6 feet tall
and wide, produce deep pink flowers, Zone 4.
'Henry's Red' - (Mezitt Hybrid) - Unusual dark red
flowers have an even darker throat. Grows best in
full sun or light shade, Zone 4.
'Hong Kong' - (David Leach Hybrid) - Primrose yellow
flowers, Zone 4.
'Hudson Bay' - White flowers are produced in small
clusters, Zone 5.
impeditum (Cloudland Rhododendron) - A small,
evergreen, dwarf shrub bearing purple flowers, Zone
5.
'Jane Abbott' (Abbott hybrid) - Deciduous, large, pink
flowers, fragrant, Zone 4.
'Janet Blair' - (Dexter Hybrid) - The large clusters of
flowers consist of frilled, light pink flowers each
with a golden eye. A plant that is wider than tall,
Zone 5.
'Jean Marie de Montague' (The Honorable Jean Marie de
Montague) - Bright red flowers, best when given some
shade, Zone 6.
'Jericho' - (David Leach Hybrid) - Yellow flowers on
plants 3 feet tall but twice as wide, Zone 5.
'June Pink' - Pink flowers on plants that will be wider
than they are tall, Zone 5.
x laetivirens - A low-growing, mounded plant that
prefers filtered sun. Rather inconspicuous, rose-
colored, tubular flowers, Zone 6.
'Landmark' - (Mezitt Hybrid) - Dark pink flowers are
almost red, Zone 5.
'Laurie' - (Mezitt Hybrid) - A slow-growing plant
reaching a height and spread of about 3 feet after 10
years. The flowers are white to light pink, Zone 5.
'Lavender Frost' - Double, light lavender flowers, Zone
5.
'Lavender Queen' - (Shammarello Hybrid) - A compact
plant with small lavender flowers having ruffled
petals, Zone 5.
'Legacy' - Robust plants produce double, dark purple
flowers, Zone 5.
'Little Olga' - (Mezitt Hybrid) - A sport of 'Olga
Mezitt' that is smaller and grows more slowly.
'Llenroc' - (Shrimp Pink Hybrid) - Light pink flowers
with a yellowish center, Zone 5.
'Lord Roberts' - Red flowers with a darker blotch, Zone
5.
'Lunar' - Bright pink flowers, Zone 5.
'Lynne Robbins Steinman' - The pink flowers are double
and have yellowish centers, Zone 5.
'Mary Kittel' - A very compact plant reaching a height
of 18 inches and a spread of 3 feet in 12 years. The
flowers are dark pink, Zone 5.
maximum - (Rosebay Rhododendron) - A fast-growing
species that grows well in shade. The flowers are
small and white to pale pink (Vis. 10), Zone 4.
maximum var. roseum - A wide plant that produces pink
blossoms after most rhododendron have finished
flowering, Zone 5.
micranthum - An Asian species with white flowers and very
small leaves, Zone 5.
'Midnight Ruby' - The dark purple flowers have a red
eye. The foliage turn dark purple to almost black in
winter, Zone 5.
'Mikkeli' - A cold hardy cultivar reaching a height and
spread of 6 feet and producing white flowers, Zone 4.
'Milestone' - (Mezitt Hybrid) - The dark pink flowers
appear to be nearly red when viewed from a distance.
This compact, twiggy plant produces red and yellow
fall color on interior leaves. A ten year old plant
has a height and spread of about 3 feet, Zone 5.
'Minnetonka' - Semi-dwarf plants produce lavender-pink
flowers.
'Mist Maiden' - Dark pin buds open to pink flowers,
compact plants 3 feet tall and wide, Zone 5.
'Molly Ann' - This 5-foot tall plant produces dark red
flowers that become more rosy red as the mature, Zone
6.
'Molly Fordham' - (Mezitt Hybrid) - A ten year old
plant is 4 feet high and 3 feet wide. The flowers
are small, white, and cluster of them nearly cover
the plant when it blooms. In shaded areas or in cold
weather the flowers will be pinkish, Zone 5.
'Montchanin' - (Guy Nearing Hybrid) - A vigorous plant
that produces white flowers borne in clusters at the
branch tips. The leaves are very small, Zone 5.
'Moonstone' - Creamy yellow flowers on a compact, 3-
foot plant, Zone 5.
'Mrs. J. A. Withington III' - Double, lavender flowers
are produced on a wide and upright plant, Zone 5.
muconulatum - Deciduous, 6 foot tall plant bearing
flowers in shades of pale lavender. The fall foliage
display is often colorful, Zone 5.
'Nantucket' - A robust, upright plant that produces
bright pink flowers, Zone 5.
'New Patriot' - The dark pink flowers appear to be red
from a distance but can be damaged by late spring
frosts, Zone 5
'Northern Starburst' - Rounded plants have a height and
spread of 5 feet and produce pink flowers, Zone 4.
'Olga Mezitt' - (Mezitt Hybrid) - The plant covers
itself with clear pink flowers (Vis. 11) in the spring.
Young plants should be sheared annually and given a
sunny location, Zone 4.
'Orange Honey' - An open plant that produces salmon-
pink flowers, Zone 5.
'Paula' - A compact plant producing mauve buds that
open to golden-pink flowers, Zone 6.
'Pauline Bralit' - The white flowers are produced on
vigorous plants, Zone 6.
'Peach Blend' - A nearly deciduous plant that produces
early pink flowers each with a yellowish center, Zone
6.
'Percy Wiseman' - Peach pink flowers, Zone 4.
'Peter Tigerstedt' - (Marjatta Hybrid) - Cold tolerant
plants produce white blooms that have purple markings,
Zone 4.
'Pillar' - Similar to P.J.M. but more upright in habit,
Zone 5.
'Pink Dawn' - Deep pink flowers are produced on a plant
with a height and width of 6 feet, Zone 4.
'Pioneer Silvery Pink' - Clear pink flowers are
produced on a vigorous plant, Zone 5.
'P.J.M.' - A group of dependable hybrids that generally
feature displays of lavender flowers (Vis. 1) in very
early spring. The dark green foliage turns plum-purple
in the fall, Zone 4.
'Purple Gem' - A slow-growing, compact, mounded plant
that produces many small, bluish purple flowers, Zone
5.
'Purple Splendor' - Dark purple flowers have a dark
blotch, Zone 5.
'Racelina' - An upright, slow growing plant that
produces small, pink flowers, Zone 6.
racemosum - A small plant bearing tiny, pink flowers,
Zone 6.
'Ramapo' - (Guy Nearing Hybrid) - A low, rounded,
mound-shaped plant that produces violet colored
flowers (Vis. 14). The foliage is light green when
young but turns bronzed in winter, Zone 5.
'Red Quest' - A compact, rounded plant producing red
flowers, Zone 5.
'Redder Yet' - Red flowers, Zone 4.
'Regal' - (P.J.M. Hybrid) - Lavender pink flowers are
produced between the flowering times of 'Victor' and
'Elite', Zone 4.
'Rocket' - (Shammarello Hybrid) - The coral pink
flowers are frilled and blotched with red, Zone 6.
'Rosamundii' - Light pink flowers on 4 foot mounded
plants, Zone 6.
rupicola - A dwarf with small, dark green leaves that
turn purple in winter. The dark purple flowers have
yellow stamens and are borne in clusters. A
protected planting location is suggested, Zone 6.
'Sassy' - A vigorous plant producing pink flowers, Zone
5.
'Sapporo' - Large white flowers have dark purple
blotches, Zone 6.
'Scarlet Romance' - Bright red flowers, Zone 5.
'Scarlet Wonder Dwarf' - A two foot tall dwarf, forming
a mound, flowers bright red, Zone 5. (Vis. 13)
'Scepter' - Large cluster of yellow flowers, Zone 5.
'Scintillation' - (Dexter Hybrid) - Large clusters of
pink flowers each with a yellow flare, Zone 5.
'Sham's Candy' ('Candy') - (Shammarello hybrid) -
Strong, purplish-pink flowers each with a greenish-
yellow blotch, Zone 5.
'Sidestep' - A wide plant that produces white flowers,
Zone 5.
'Small Wonder' - (David Leach Hybrid) - Dark red
flowers are produced on a slow-growing and dense
plant. Winter protection is recommended, Zone 6.
'Smir-yak' - A dense, low-growing plant that needs
protection from winter winds. The flowers buds are
pink but the flowers are nearly white. The silvery
new shoots contrast with the darker older foliage,
Zone 6.
'Splash' - Nearly red flowers are produced on compact,
spreading plants, Zone 5.
'Spring Dawn' - The rosy pink flowers have a yellow
blotch, Zone 5.
'Staccato' - The pink flowers are semidouble and have
ruffled petals, Zone 5.
'Starburst' - Ruffled, lavender flowers have yellowish
inner petals, Zone 5.
'Sumatra' - (David Leach Hybrid) - The pink flowers
have purple spots, Zone 5.
'Tapestry' - The purple flowers are produced on a
compact plant, Zone 5.
'Teddy Bear' - Pale pink flowers, Zone 5.
'Tennessee' - Pale, bluish-pink flowers, Zone 5.
'Thunder' - (P.J.M. Hybrid) - Dark, pinkish-purple
flowers display best color when the plant is grown in
full sun, Zone 5.
'Tony' - A low-growing plant producing bright red
flowers, Zone 5.
'Tottenham' - A compact and slow-growing plant that
produces small, pink flowers, Zone 5.
'Trilby' - Deep red flowers with black blotches, the
stems are a distinctive red, Zone 5.
'Trinidad' - (David Leach Hybrid) - Large clusters of red
and white flowers, Zone 4.
'Trojan Warrior' - The dark, purplish-red flowers are
produced on plants that have twisted, dark green
foliage, Zone 5.
'Unique' - The pink buds open to creamy yellow flowers,
four-foot mounded plant, Zone 6.
'Vallya' ('Wally') - (Shrimp Pink Hybrid) - An 8 year
old plant will be about 4 feet tall and 2 feet wide.
The pink flowers hold their color throughout the
bloom period. The interior leaves turn red and
yellow before they drop, Zone 5.
'Vernus' - Large pink flowers have red markings, Zone 6.
'Victor' - (P.J.M. Hybrid) - The lavender-pink flowers
are produced about two days after those of other
P.J.M. hybrids, Zone 4.
'Victoria's Consort' - (Mezitt Hybrid) - The ivory
flowers have golden throats but become more yellow as
they mature, Zone 5.
'Virginia Richards' - The pale yellow flowers are
flushed with pink and have red blotches, Zone 6.
'Vulcan' - Red flowers on a mounded, 5- to 7 foot tall
plant, Zone 5.
'Waltham' - (Mezitt Hybrid) - A ten year old plant will
be about 1 foot high and 3 feet wide. The flowers
are clear pink. A partially shaded location is
suggested, Zone 5.
'Warwick' - (Dexter Hybrid) - A wide plant that
produces pink flowers, Zone 6.
'Wendy Lyn' - The red buds open to star-shaped, white
flowers each edged with red, Zone 5.
'Westbury' - (Dexter Hybrid) - Large, pink flowers are
produced on a wide plant, Zone 6.
'Weston' - Pink flowers are produced on compact plants,
Zone 5.
'Weston's Crescendo' - (Mezitt Hybrid) - Large leaves
and yellowish pink to pink flowers are produced on a
compact plant, Zone 5.
'Weston's Mayflower' - A ten year old plant will be 3
feet wide and 2 feet high. The pink flowers are
borne in small groups. Grows well in sun or shade,
Zone 5.
'Weston's Pink Diamond' - (Mezitt Hybrid) - The double,
pink flowers have a silvery center. The foliage
turns red, orange and yellow in the fall. This
vigorous plant will be more than 6 feet tall at
maturity. Provide a site that has full sun and is
not susceptible to late spring frosts, Zone 5.
'Weston's Starburst' - (Mezitt Hybrid) - Ruffled,
lavender flowers have yellowish inner petals, Zone 5.
'White Dimples' - A vigorous, upright plant produces
large, white flowers, Zone 5.
'Wilsoni' - Pale pink flowers, Zone 5.
'Windbeam' - (Guy Nearing Hybrid) - The pink flowers
are borne in rounded clusters. The leaves turn
rusty-green in winter, Zone 5.
'Wissahickon' - (Dexter Hybrid) - Rose colored flowers
each with deeper red throats and brown spotting, Zone
5.
'Wojnar's Purple' - Bright reddish-purple flowers, Zone
5.
'Wynterset White' - White flowers, Zone 5.
yakusimanum - A hardy species with pink flowers, plants
only 3 feet tall, Zone 4.
yakusimanum 'Crete' - Purplish-pink flowers, Zone 5.
yakusimanum 'Yaku Angel' - (Shammarello hybrid) - A low
plant with white flowers. Zone 5.
yakusimanum 'Yaku King' - (Shammarello hybrid) - The
red buds open to pink flowers fading with age, Zone
5.
yakusimanum 'Yaku Prince' - (Shammarello hybrid) -
Purplish pink flowers with a lighter blotch and dark
orange spotting, Zone 5.
yakusimanum 'Yaku Princess' - (Shammarello hybrid) -
The pink flowers fade with maturity and have greenish
spots, Zone 5.
yakusimanum 'Yaku Queen' - (Shammarello hybrid) - Pale
pink flowers (Vis. 12) with a faint yellow blotch, Zone
5.
'Years of Peace' - A vigorous and upright plant
producing pink flowers, Zone 5.

References for Cultivars: Weston Nurseries 1999, Monrovia
Nursery Company 1997, Rosebay Nursery 1995, Bailey Nurseries
1999, Berryhill Nursery Company 1995, Lake County Nursery
1999, Princeton Nurseries 1999, Ray Wiegand's Nursery 1999,
White Flower Farm 1997, Iseli Nursery 1999, Wayside Gardens
1999, Sheridan Nurseries 1999, Select Plus International
Nursery 1999, Studebaker Nurseries 1999, Berryhill Nurseries
1999, Scarff's Nursery 1999, Gee Farms 1999, Willoway
Nurseries 1999.


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