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. Hardy Species Survey Responses - R-Z
Rhododendron racemosum
Picture by S & J Perkins
Rhododendron racemosum in Concord, MA

Species Type Greer Others Group Grower Zone Years Still Flowered? Healthy? Comment
    °F °F Rating     Owned Owned?      

racemosum Lepidote -5 -10 B Blanchette 5A 5 N
  Gamlin 5A 2 N N N Not hardy without snot cover.
  Mezitt 5B 15 N Y N
  Brooks 5B 4 Y Y Y
  Perkins 5B 5 Y Y Y 2 cultivars Perkins' Rating: B
  Taylor 5B 20 Y Y Y Small plants, 2" leaves.
  de Burlo 6A 20 Y Y Y Two plants. Both profuse bloomers, 18" by 20" wide.
  Magoun 6A 10 Y Y Y First plant died after 12 yrs. Second plant bought from ME nursery to increase hardiness chances.
  Wrightington 6A 3 Y Y Y
  Huie 7A 8 Y Y Y 5 plants. Consider it first rate.

recurvoides Elepidote -10 -5 B Brooks 5B 2 Y N Y
  Clark 5B 11 Y N Y 2 RSF 74/099. RSF 75/056 (11 yrs), and RSF 74/098 (died one summer after 4 yrs.)
  Perkins 5B 7 Y N Y Perkins' Rating: B
  de Burlo 6A 2 Y N Y
  Silverman 6A 2 Y N
  Wrightington 6A 13 Y N Y
  Coleman 6B 8 Y N Y
  Huie 7A 3

reticulatum Evergreen AZ -10 -10 C Brooks 5B 4 Y N Y
  Perkins 5B 3 Y N Y Perkins' Rating: C

rex Elepidote 5 -5 C Huie 7A 5 ssp. fictolacteum. Grafted on County of York.

rigidum Lepidote -5 0 C Huie 7A 3

ririei Elepidote -5 -5 C Coleman 6B 3 Y N Y

roxieanum Elepidote -10 B Clark 5B 6 N N N slow death in spite of winter protection
  Perkins 5B 2 Y N Y Others have died suddenly after flourishing Perkins' Rating: C

rubiginosum Lepidote 0 0 C ------ -- Some plants formerly species desquamatum.
  Clark 5B 8 Y N Y
  Wrightington 6A 3 Y N Y
  Huie 7A 9 3 plants

rupicola Lepidote -10 -10 C Brooks 5B 20 N Y N
  Perkins 5B 6 Y N Y Perkins' Rating: D

russatum Lepidote -15 -5 A Blanchette 5A 5 N Y Y
  Gamlin 5A 5 Y N Y Still small.
  Brooks 5B 16 Y Y Y
  Clark 5B 8 Y Y Y Black Velvet'
  Perkins 5B 8 Y Y Y 2 plants Perkins' Rating: B
  Wrightington 6A 12 Y Y Y
  Huie 7A 16 Y Y ? Is a 'fair' performer.

saluenense Lepidote -5 -5 C Brooks 5B N
  Perkins 5B 7 N N N Never flourished Perkins' Rating: C

schlippenbachii Deciduous AZ -25 -25 A Ebert 11 Y Y Y Big drawback is that flowers last a very short time. Would not get any more.
  Harrison 5 Y N Y
  Birkrem 4B 8 Y Y Y In a protected place. Shy bloomer, needs more sun.
  Gamlin 5A 22 Y Y Y
  Hagner 5A 7 Y Y Y
  Bensley 5B 8 Y Y Y
  Brooks 5B 26 Y Y Y Needs a lot of room to develop full potential. In flower, it eclipses everything else in the garden.
  Bruso 5B 6 Y N Y
  Carlhian 5B 10 Y Y Y
  Clark 5B 7 Y N Y album (7 yrs) and wild type (15 yrs)
  Crosby 5B 14 Y Y
  Martino 5B 15 Y Y
  Mezitt 5B 50 Y Y Y
  Moore 5B 17 Y Y
  Perkins 5B 12 Y Y N 2 cultivars Not a good doer Perkins' Rating: D
  Taylor 5B 30 Y Y
  Blackler 6A 7 Y Y slow to bloom
  de Burlo 6A 17 Y Y Y
  Hibben 6A 8 Y Y
  Horowitz 6A 3 Y N lost 1/2 plant to borers
  Magoun 6A 7 Y N Y Shows weather damage.
  Nash 6A 20 Y Y did not bloom young
  Wrightington 6A 12 Y Y Y
  Albrecht 6B 10 Y Y
  Coleman 6B 30 Y Y Y
  Forrest 6B 4 Y Y Y
  Rindler 6B 35 Y Y Always splendid.
  Huie 7A 15 2 plants
  Gilchrist 7A 3 Y N

searsiae Lepidote -5 -5 C Coleman 6B 8 Y Y Y

semibarbatum Other -5 -15 C Brooks 5B N
  Perkins 5B 8 Y Y Y Perkins' Rating: B

serpyllifolium Evergreen AZ -10 0 C Brooks 5B N
  Forrest 6B 2 Y N Y

smirnowii Elepidote -15 -25 A Hoferova 21 Y Y
  Blanchette 5A 6 N N
  Gamlin 5A 12 Y Y Y
  Bensley 5B 7 Y N Y
  Brooks 5B 28 Y Y Y Wonderful plant.
  Carlhian 5B 34 Y Y Y
  Clark 5B 25 Y Y Y Loses branches to borers.
  Jessen 5B 25 Y Y slow bloomer; bloom after -26°
  Mezitt 5B 30 Y Y Y
  Perkins 5B 10 Y Y Y 4 cultivars Perkins' Rating: B
  Taylor 5B 40 Y Y some years loses buds- same for a friend nearby
  de Burlo 6A 2 Y Y Y
  Magoun 6A 5 Y Y Y
  Wechsler 6A 2 Y N
  Wrightington 6A 16 Y Y Y
  Coleman 6B 8 Y N Y Very healthy.
  Tietjen 6B 18 Y Y from Mehlquist- flowers every year
  Huie 7A 14 2 plants
  Hill 7A 5 Y N from Mehlquist

stenopetalum Evergreen AZ C ------ -- Some plants formerly species linearifolium.
  de Burlo 6A 2 Y Y Y
  Huie 7A 11 Kept in lath house in winter.

strigillosum Elepidote 5 C Huie 7A 4 2 plants

sutchuenense Elepidote -10 -5 A Gamlin 5A 12 Y N Y
  Brooks 5B 21 Y Y Y Takes many years to bloom.
  Bruso 5B 4 Y N
  Jessen 5B 20 Y Y only blooms after -5° winters
  Perkins 5B 4 Y N Y Perkins' Rating: C
  Huie 7A 7 2 plants

taliense Elepidote -5 -10 B Perkins 5B 3 N N N Never flourished Perkins' Rating: C
  Brooks 5B 6 Y N Y Slow to bloom.
  Wrightington 6A 6 Y N Y
  Huie 7A 4

telmateium Lepidote -5 -5 C Perkins 5B 4 N N N Poor location Perkins' Rating: C

tosaense Evergreen AZ 5 0 C Huie 7A 11 2 plants

trichostomum Lepidote -5 0 C Perkins 5B 3 N N N Never flourished Perkins' Rating: C

tsariense Elepidote -5 C Clark 5B 6 Y Y Y

tschonoskii Evergreen AZ -15 -20 C Brooks 5B 5 Y N Y
  Clark 5B 4 Y Y Y

ungernii Elepidote -10 C Brooks 5B 2 Y N
  Perkins 5B 2 Y N N Severe Winter Damage
  Huie 7A 12 Y Y Y From Cox seed via Bovee Nursery.

vaseyi Deciduous AZ -15 -20 A Bensley 5B 11 Y Y Y Lost one of many. All have had flowers reliably
  Carlhian 5B 12 Y Y Y
  Clark 5B 10 Y Y Y Wild type and 'White Find'
  Perkins 5B 11 Y Y Y 2 cultivars Perkins' Rating: A

vernicosum Elepidote -15 -5 B Blanchette 5A 10 Y Y Y
  Brooks 5B N
  Perkins 5B 4 Y N Y Perkins' Rating: C
  Wrightington 6A 12 Y Y Y
  Coleman 6B 4 Y Y Y
  Huie 7A 14

viscistylum Evergreen AZ -5 C Huie 7A 5

viscosum Deciduous AZ -15 -25 A Bensley 5B 3 Y Y Y
  Carlhian 5B 49 Y Y Y
  Clark 5B 23 Y Y Y native
  Perkins 5B 12 Y Y Y 6 plants Perkins' Rating: A

wadanum Evergreen AZ -5 -5 C Gamlin 5A 10 Y Y Y
  Brooks 5B 7 Y N Y

wallichii Elepidote -10 0 C Perkins 5B 4 Y N Y 2 cultivars Perkins' Rating: C

wardii Elepidote 0 -10 C Perkins 5B 4 Y N Y Perkins' Rating: C
  Wrightington 6A 14 Y N Y

wasonii Elepidote -5 -10 C Brooks 5B N

websteranum Lepidote -5 -10 C Perkins 5B 4 N N N Poor locartion Perkins' Rating: B
  Brooks 5B 14 Y Y Y

weyrichii Evergreen AZ -10 0 C Brooks 5B 3 Y N Y
  Huie 7A 5

williamsianum Elepidote -5 -10 B Brooks 5B 9 Y N Y
  Perkins 5B 7 Y Y Y 3 cultivars Perkins' Rating: B
  Forrest 6B 3 Y N Y Of 2 plants acquired, 1 has died.

wiltonii Elepidote -5 -10 B Brooks 5B 2 Y N Y
  Perkins 5B 5 Y N Y Perkins' Rating: C
  de Burlo 6A 17 Y Y Y

yedoense Evergreen AZ -5 -10 A ----- -- Some plants formerly species poukhanense.
  Gamlin 5A 18 Y Y Y
  Brooks 5B 24 Y Y Y var. poukhanense
  Mezitt 5B 50 Y Y Y
  Perkins 5B 12 Y Y Y 4 plants Perkins' Rating: A
  Magoun 6A 10 Y Y Y
  Wrightington 6A 13 Y Y Y
  Huie 7A 15 var. poukhanense

yungningense Lepidote -15 -5 C ----- -- Some plants formerly species glomerulatum.
  Perkins 5B 3 Y Y Y Perkins' Rating: B
  Wrightington 6A 2 Y N Y

yunnanense Lepidote 0 0 C Huie 7A 12

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