JARS v50n1 - Winter That Was, Part II

Winter That Was, Part II
Max Byrkit
Hagerstown, Maryland

In the Fall 1995 issue author Max Byrkit described the the winter of 1993-1994, with temperatures as low as -25°F, and its effect on his garden. Part II gives a detailed report on the effect on individual rhododendrons in his garden near Hagerstown, Maryland.

Rhododendron Plant Damage Key
Height: Given in feet.
Health prior to winter 1993-94: P = poor, F = fair, G = good, E = excellent.
Damage: 0 = none, 1 = minimal leaf damage above snow line, 2 = moderate leaf damage above snow line, 3 = severe leaf damage above snow line with dieback, 4 = dead plant.
Exposure: E = exposed, S = semi-exposed, P = protected.
Transplanted: <12 = under 12 months, 1 2-36 = 12 to 36 months, >36 = over 36 months.
Bloom: N = none, P = partial trusses above snowline, F = full trusses above snow line, ? = not recorded, NN = dead plant, B = budless.

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

('Atroflo' x ?) x ('Mary Belle' x Marcat Group*)

3.0

F

1

S

<12

B

'Aronimink'

7.0

G

1

S

>36

N

'Autumn Gold' x R. yakushimanum

3.5

G

3

S

>36

N

R. wardii var. wardii (formerly R. astrocalyx ) (#2)

2.0

G

0

S

>36

N

R. brachycarpum x 'Crest'

5.0

G

0

S

<12

N

'Atroflo'

5.5

F

3

S

>36

N

'Catalgla' x 'Sappho'

3.0

F

1

S

>36

N

'Atrosanguineum'

6.0

G

1

S

>36

N

'Direktör E. Hjelm' x R. yakushimanum (#2)

4.5

F

3

S

>36

N

R. augustinii (Gable)

3.5

G

3

S

12-36

P

'Fabia' x R. fortunei , white-flrd.

4.5

G

3

S

>36

N

'Aunt Martha'

6.0

G

4

S

<12

NN

('Goldfort' x 'Chlorops'*) x ('Hawk' x 'Idealist')

5.0

P

4

S

<12

NN

'Aurora' (L. de Rothschild)

11.0

F

4

P

>36

NN

'Goldfort' x 'Chlorops'

5.0

F

4

S

>36

NN

'Avocet'

4.5

F

0

S

>36

N

'Goldfort' x ( R. yakushimanum x 'Harvest Moon')

7.5

F

2

S

>36

N

'Babylon' (#1)

2.0

E

0

S

>36

N

'Goldsworth Orange' x R. catawbiense , white-flrd.

3.0

F

4

S

>12

NN

'Babylon' (#2)

5.0

G

4

S

>36

NN

('Great Lakes' x 'Edmund de Rothschild') x 'Goldsworth Orange'

5.0

F

3

S

<12

N

'Bali'

3.0

E

1

S

>36

N

('Janet Blair' x 'Odee Wright') x ('Jalisco' x R. yakushimanum )

6.0

G

0

S

>36

N

'Bangkok'

6.0

F

1

S

>36

N

'Janet Blair' x R. strigillosum ?

5.0

G

0

S

>36

N

'Barbara Hargrove'*

7.0

G

4

P

>36

NN

R. maximum x 'Mary Garrison'*) (#1)

6.0

E

0

S

>36

N

'Belle Heller'

9.0

F

2

P

>36

N

R. maximum x 'Mary Garrison'*) (#2)

7.5

C

0

S

>36

N

'Hachmann's Belona'

2.0

E

0

S

<12

N

('Millard Kepner' x 'OIin O. Dobbs') pur. #1

6.0

G

2

S

>36

N

'Ben Moseley'

6.0

E

1

P

>36

N

('Millard Kepner' x 'Olin O. Dobbs') pur. #2

7.0

G

3

S

>36

N

'Betsy Knuson'*

6.0

G

0

S

<12

N

('Millard Kepner' x 'Olin O. Dobbs') pink

3.0

F

2

S

<12

N

'Betty Arrington' sport

4.0

G

0

S

>36

N

'Old Copper' x R. hyperythrum

3.5

G

2

S

<12

N

'Betty Hume'

8.0

E

3

S

>36

N

'Princess Elizabeth' x R. yakushimanum

5.0

G

1

S

>36

N

'Mrs. Betty Robertson'

3.0

F

3

P

>36

N

'Scintillation' x 'Hardy Giant'

5.0

F

2

S

>36

N

'Big Savage'

6.0

F

0

S

>36

N

R. simiarum x R. yakushimanum

1.5

F

3

S

>36

N

'Blewbury'

3.5

E

0

S

>36

N

( R. wardii x R. caloxanthum ) x ( R. fortunei x R. campylocarpum )

5.0

F

4

P

>36

NN

'Blue Ensign'

5.5

G

1

S

>36

N

R. yakushimanum x 'Purple Splendour'

3.0

G

0

S

>36

N

'Blue Peter'

5.0

F

1

S

>36

N

R. yakushimanum x R. sutchuenense

1.0

F

1

S

<12

P

'Blue Ridge'

4.5

G

3

S

12-36

N

'Acclaim'

4.5

F

0

S

>36

N

'Bob Bovee'

3.0

F

0

P

>36

N

'Adele's Yellow'

2.0

E

0

S

<12

N

'Bosutch'

6.5

G

3

P

>36

N

R. adenopodum (#1)

5.5

F

4

S

<12

NN

'Boule de Neige'

2.5

E

0

S

>36

N

R. adenopodum (#2)

5.0

G

4

P

>36

NN

'Boule de Neige' (#2)

5.0

G

0

S

>36

N

R. adenopodum (#3)

7.0

G

1

S

>36

N

'Boule de Rose'

5.0

G

1

S

>36

N

'Advent'

3.0

G

3

S

>36

N

R. brachycarpum (#2)

6.0

F

0

S

>36

N

'Albert Close'

8.5

E

0

S

>36

N

R. brachycarpum ssp. tigerstedtii (#1)

<1.0

E

0

S

<12

N

'Album Elegans'

6.0

F

1

P

>36

N

R. brachycarpum ssp. tigerstedtii (#2)

2.0

E

0

P

>36

N

'Aloha'

1.5

G

0

S

<12

N

R. brachycarpum x ?

9.0

G

0

S

>36

N

'America'

5.0

F

0

P

>36

N

'Bravo!'

4.5

G

0

S

>36

N

'Andorra'

2.0

F

0

S

>36

N

'Brookville'*

9.0

G

0

S

>36

N

'Anna H. Hall' x 'Fabia'

2.0

G

3

S

>36

N

'Brown Eyes'

4.5

G

0

S

>36

N

'Anna H. Hall'

8.0

G

0

S

>36

N

R. bureavii

3.0

G

1

E

>3b

N

'Mrs. Powell Glass' (syn. 'Anne Glass')

5.0

G

0

S

>36

N

'Cadis'

9.0

F

2

S

>36

N

R. maculiferum ssp. anwheiense (#1)

5.0

F

0

S

>36

N

R. maculiferum ssp. anwheiense (#2)

1.5

E

0

S

>36

F

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

R. calophytum

3.5

G

3

P

>36

N

'Ginny Gee'

1.0

G

0

S

12-36

F

'Calsap'

4.5

G

0

S

12-36

N

'Girard's Ruffled Red'

1.5

G

0

S

12-36

N

'Campy'*

10.0

G

0

P

>36

N

'Glenolden'*

7.0

G

4

P

>36

NN

'Canary Islands'

1.5

G

0

S

<12

B

'Golden Star'

6.5

G

3

S

>36

N

'Carlene'

5.0

G

0

S

<12

N

'Goldfort'

7.5

G

1

S

>36

N

'Caroline'

8.5

E

0

S

>36

N

'Goldsworth Yellow'

6.0

P

1

P

>36

N

'Caroline Cream'*

3.5

F

0

S

>36

N

'Grotesque'*

7.0

G

2

S

>36

N

R. minus Carolinianum Group

5.0

G

0

P

>36

N

'Haida Gold'

1.5

G

1

S

12-36

B

'Casanova'

1.5

F

0

S

>36

N

Loderi Group (hardy #1)

3.0

G

0

S

<12

N

'Catfortcampy'*

5.0

G

2

S

>36

N

Loderi Group (hardy #2)

4.5

G

1

S

<12

N

R. catawbiense (RSF 77/620)

2.5

F

0

S

<12

F

'Harold Amateis'

7.0

G

0

P

>36

N

'Catawbiense Album'

7.0

G

0

S

>36

F

R. hemsleyanum

7.0

G

4

S

>36

N

R. catawbiense f. insulare

4.5

G

0

S

>36

F

'Henry R. Yates'

5.5

G

1

S

>36

N

R. catawbiense, red-flrd.

3.0

F

0

S

12-36

F

'Henry's Red'

2.5

E

1

S

<12

N

'Catawbiense Boursault'

10.0

E

0

S

>36

N

'Hong Kong'

0.5

G

1

S

>36

B

R. catawbiense , white-flrd.

9.0

G

0

P

>36

F

R. houlstonii

5.0

F

3

S

>36

N

R. caucasicum

3.5

G

2

S

>36

B

R. houlstonii (type B)

2.5

F

2

S

>36

N

R. caucasicum (Gable)

2.0

G

0

P

>36

N

R. houlstonii (type C)

2.0

G

2

S

>36

N

R. caucasicum x R. fortunei ssp. discolor

5.0

G

4

S

>36

NN

R. hyperythrum

3.5

G

3

S

>36

N

'Ceylon'

5.0

G

0

S

12-36

?

R. hyperythrum (best)

3.5

E

3

S

>36

N

'Clara Raustein'

3.5

G

3

S

>36

N

'Ice Cream'

5.0

G

0

S

>36

N

'Conestoga'

6.0

G

0

S

>36

N

'Ice Cube' (#2)

7.0

G

1

P

>36

N

'Conewago'

6.5

G

0

S

>36

P

'Ida Bradour'

7.5

G

3

S

>36

N

'Conewego Improved'

6.0

G

0

S

>36

N

'Irresistible Impulse'*

4.0

F

1

S

<12

N

'Cosmopolitan'

3.0

F

3

S

>36

N

'Jack Owen Yates'

7.0

F

1

S

>36

N

'Crimson Pippin'

<1.0

F

0

S

<12

B

'James Burchett'

6.0

G

3

S

>36

N

'Cunningham's White'

5.0

F

3

S

>36

N

'Joe Paterno'*

3.0

F

3

S

>36

N

'Cupcake'

1.0

G

1

S

<12

N

'Joshua'*

2.0

F

1

S

<12

B

R. dauricum (white #1)

3.0

G

0

S

12-36

P

'Judy Spillane'

2.0

E

0

S

<12

N

R. dauricum (white #2)

5.0

F

0

S

>36

P

'July Hope'*

3.5

F

1

S

>36

N

R. dauricum (pink #1)

4.5

E

0

S

>36

N

'Katarina'*

4.5

G

3

S

<12

N

'David Gable'

6.0

G

0

S

>36

N

'Kate Waterer'

5.0

F

2

P

>36

N

Decatros Group (white flrd.)

5.0

G

4

S

>36

NN

'Catharine van Tol'

8.0

F

2

P

>36

N

R. decorum (Gable's hardy)

8.0

G

4

S

>36

NN

R. keiskei (#1)

3.0

F

3

S

>36

N

'Dexter's Big Red'*

5.5

F

3

S

>36

N

'Kentucky Cardinal'

6.0

F

1

S

>36

N

'Dexter's Orchid'*

3.0

P

1

S

>36

N

R. keiskei (Gable form tall)

3.0

G

2

S

>36

N

Dexter seedling x 'Ruby Bowman'

5.5

G

3

S

12-36

N

R. keiskei (seedling)

2.5

G

2

S

>36

N

'Dexter's Pink Glory'

5.0

G

3

S

>36

N

'Kevin'

4.0

F

4

P

>36

NN

'Dexter's Red Velvet'*

2.5

F

2

S

12-36

N

'Kimberly'

5.5

G

3

S

>36

N

'Dexter's Champagne'*

2.5

G

2

S

<12

B

'Lady of June'

5.5

G

1

S

>36

B

'Diana'

1.0

G

0

S

<12

B

'Lavender Girl'

10.0

G

0

P

>36

N

'Direktör E. Hjelm'

8.0

G

4

P

>36

NN

'Lee's Dark Purple'

6.0

G

0

S

>36

N

'Directör E. Hjelm x R. yakushimanum

5.5

G

0

S

<12

NN

'Lee's Dark Purple' (#2)

7.0

G

2

S

>36

N

'Disca' (#1)

5.0

G

1

S

>36

N

'Lodestar'

2.5

G

0

S

>36

N

'Disca' (#2)

10.0

G

2

P

>36

N

'Looking Glass'

1.0

G

0

S

<12

B

'Dolly Madison'

12.0

G

1

P

>36

N

'Lord Roberts'

2.5

F

1

S

>36

N

'Donna Hardgrove'

6.5

F

4

S

>36

NN

'Madame Carvalho'

6.0

F

1

S

>36

N

'Dora Amateis'

3.0

F

2

S

>36

N

'Madame Masson'

5.0

F

2

S

>36

N

'Dorothy Russell'

9.0

G

3

S

>36

N

'Magnificat'

1.5

G

0

S

12-36

N

'Douglas R. Stephens'

2.0

G

2

S

<12

B

R. makinoi

3.5

G

0

E

<12

N

'Duke of San Lucar'*

6.0

F

4

P

>36

NN

'Maletta'

3.0

F

3

S

>36

N

'Earlene'

2.0

E

0

S

>36

N

Marcat Group*

2.5

F

3

P

>36

N

'Ed's Red'

5.0

G

1

S

>36

N

'Mary Fleming'

4.0

G

0

S

>36

N

'Edmond Amateis'

8.0

E

0

S

>36

N

'Mary Yates'

4.0

F

3

S

12-36

N

'Edward S. Rand'

9.0

G

1

P

>36

N

'Mary Belle' x 'Crest'

2.5

F

3

S

>36

N

'Elie' x 'Naomi Nautilus'

6.5

F

0

S

12-36

N

'Maxhaem Salmon'

5.0

F

2

P

>36

N

'Endre Ostbo'

5.5

E

0

S

>36

N

'Maxhaem Yellow'*

6.0

G

2

S

>36

N

'Epoch' x 'Barto Blue'

3.0

G

2

S

12-36

N

'Maxecat'

9.0

G

0

S

>36

N

'Fantastica'

2.0

G

0

S

<12

N

R. maximum 'Mount Mitchell'

6.0

G

0

S

>36

?

'Fastuosum Flore Pleno'

6.0

G

0

S

>36

N

R. maximum x R. yakushimanum

2.0

E

0

S

>36

N

R. fletcherianum

3.0

G

3

P

>36

N

'May Time'

6.0

F

1

S

>36

N

'Flirt'

1.0

G

0

S

<12

B

'Merley Cream'

9.0

G

0

S

>36

N

R. fortunei ("4N Fort" polyploid)

4.0

G

4

P

>36

NN

R. degronianum (coll. Kumano Gorge)

3.5

G

0

P

>36

N

'Francesca'

7.0

G

0

P

>36

N

R. degronianum var. brevifolium

2.5

E

0

P

>36

N

'Freckles'

10.0

G

2

S

>36

N

R. micranthum (lepidote)

6.5

G

0

S

>36

F

'Gigi'

8.0

E

3

S

>36

N

R. minus

4.0

G

0

P

>36

F

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

Name

Height

Health

Damage

Exposure

Transplant

Bloom above snow

'Monaco'

2.0

G

0

S

12-36

N

'Shanghai' (#1)

3.0

F

0

P

>36

N

'Montego'

2.0

G

1

S

<12

N

'Shanghai' (#2)

7.0

P

2

S

<12

N

'Moon Shot'

3.5

F

2

S

>36

N

'Sir James'

6.0

G

0

S

>36

N

'Mr. W.R. Coe'

5.0

G

2

S

12-36

N

R. smirnowii

5.0

P

1

S

>36

N

'Mrs. Furnival' x R. yakushimanum

1.0

G

0

S

12-36

N

'Solidarity' (#1)

1.5

E

0

S

<12

B

'Mrs. Tom H. Lowinsky'

9.0

G

3

P

>36

N

'Solidarity (#2)

2.5

E

2

S

>36

N

'Mrs. Tom H. Lowinsky'

8.0

F

2

S

>36

N

'Spellbinder'

4.5

G

S

>36

N

'Mrs. Furnival'

2.0

F

2

S

>36

N

'Spring Dawn'

4.0

F

2

P

>36

N

'Mrs. Powell Glass'

6.0

G

0

S

<12

N

'Spring Frolic'

5.0

G

0

S

>36

N

'Mrs. H.R. Yates'*

5.0

G

0

S

>36

N

'Sumatra'

1.5

E

0

S

<12

B

R. mucronulatum

7.0

G

0

P

>36

N

'Summer Summit'

2.0

G

1

S

<12

B

R. myrtifolium

5.5

G

2

S

>36

N

Tally Ho' x R. smirnowii

6.5

F

4

S

>36

NN

'Nearing's Purple'*

5.0

G

0

P

>36

N

'Tanyosho'*

2.0

E

0

S

>36

N

'Nodding Bells'*

3.5

G

3

P

>36

N

'Suzy Bell'

2.5

F

2

S

>36

N

'Nova Zembla'

5.0

F

0

S

>36

N

'Todmorden'

9.0

G

1

S

>36

N

'Old Copper'

2.5

F

3

S

>36

N

'Tom Everett' (#1)

4.0

F

0

S

>36

N

'Old Port'

6.0

F

1

S

>36

N

'Tom Everett' (#2)

5.5

G

3

S

>36

N

'Olin O. Dobbs'

6.0

F

2

P

>36

N

'Trinidad'

1.5

G

0

S

12-36

B

'Orange Marmalade'

2.5

F

3

S

>36

B

'Trude Webster'

6.0

F

4

S

>36

NN

PJM Group

6.0

E

0

S

>36

N

'True Treasure'*

4.0

G

3

S

>36

N

'Parker's Pink' (#1)

6.0

G

3

S

>36

N

R. vernicosum aff. Rock 18139

5.0

G

3

S

>36

N

'Parker's Pink' (#2)

7.0

F

3

P

>36

N

R. vernicosum x 'Hardy Giant'

5.5

G

0

S

<12

N

'Parsons loriosum' (plant #2)

8.0

G

0

S

>36

N

'Vernus'

1.5

G

0

P

12-36

N

'Parsons loriosum' (plant #1)

9.0

G

1

P

>36

N

'Vineland Fragrance'

4.5

G

0

S

>36

N

'Party Pink'

3.0

G

0

S

>36

N

Vossburg C-33

5

F

0

S

>36

N

'Peaches and Cream' (Gable)*

4.5

E

0

S

12-36

N

'Vulcan's Flame'

4.0

F

3

S

>36

N

'Percy Wiseman'

2.0

F

S

<12

N

R. wardii var. wardii

6.0

F

3

S

>36

N

'Peter Alan'*

2.5

G

0

S

<12

N

'Warwick'*

7.0

G

2

S

>36

N

'Pink Flair'

3.5

G

0

P

>36

N

'Wheatley'

6.0

G

0

S

12-36

N

'Pioneer'

7.0

E

1

S

>36

N

'Wheatley'

8.0

G

0

S

>36

N

'Pleasant Bay Fragrance'*

2.0

G

0

S

12-36

B

'Willowcrest'*

2.0

G

0

S

12-36

N

'Popeye'*

3.0

F

2

S

>36

N

'Laetevirens'

4.0

E

0

P

<12

N

'President Lincoln'

8.0

G

0

S

>36

N

'Wynterset White'

2.0

G

3

E

<12

N

'Princess Elizabeth'

2.5

P

3

S

>36

N

'Winterthur Pink'*

7.0

G

3

P

>36

N

R. pseudochrysanthum (#2)

3.5

G

4

P

>36

NN

'Wyandanch Pink'

8.5

E

0

S

>36

N

R. pseudochrysanthum (Greer)

3.0

E

3

S

12-36

N

'Wyanokie'

5.0

E

0

S

>36

N

'Purple Lace'

7.0

F

2

P

>36

N

R. yakushimanum (#1)

3.5

E

2

S

<12

N

'Purpureum Grandiflorum'

10.0

E

0

S

>36

N

R. yakushimanum (#2)

1.5

E

0

S

<12

N

'Queen Anne's'

3.0

G

0

S

>36

N

'Yaku Prince'

3.0

G

0

S

>36

N

'Raspberry Sundae'*

4.0

G

3

S

>36

N

'Yaku Prince' (#2)

6.0

G

0

S

>36

N

'Ravels'

7.5

G

1

S

>36

N

'Yaku Princess'

3.5

G

0

S

>36

N

'Red Head' (Gable)

2.0

F

3

P

>36

N

'Yaku Queen'

3.5

G

0

S

>36

N

'Rio'

3.0

E

0

S

>36

N

R. yakushimanum (Exbury #1)

3.0

G

2

S

>36

N

'Robert Allison'

9.0

F

2

P

>36

N

R. yakushimanum (Exbury #2)

3.0

E

0

P

>36

N

'Rochelle'

10.0

G

2

S

>36

N

R. yakushimanum 'Mist Maiden'

5.0

E

0

S

>36

N

'Roseum Elegans'

2.0

E

0

S

<12

N

R. yakushimanum 'Angel'*

5.5

G

1

P

>36

N

'Roseum Superbum'

11.0

G

0

P

>36

N

R. yakushimanum 'Angel' x R. makinoi

1.5

E

0

S

12-36

N

'Roseum Two'*

2.0

G

1

E

<12

N

R. yakushimanum 'Ken Janeck'

6.0

E

0

P

>36

N

'Royal Pink'

2.5

F

2

S

>36

N

R. yakushimanum x R. bureavii (#1)

6.0

G

0

S

>36

N

R. rubiginosum

5.0

F

3

S

>36

N

R. yakushimanum x R. bureavii (#2)

3.0

E

0

P

>36

N

''Sagamore Bayside'

6.0

F

2

S

>36

N

R. yakushimanum x R. elliottii

3.0

G

3

S

>36

N

'Sammetglut'

2.5

F

2

S

>36

N

R. yakushimanum x 'Rose Splendour'

4.0

F

3

P

>36

N

'Scarlet Romance'

2.0

G

1

S

12-36

N

R. yakushimanum x R. simiarum (#2)

2.5

G

3

S

>36

N

'Scintillation' (Mehlquist)

2.0

F

0

0

<12

B

'Yates' Best'

2.5

F

0

P

>36

N

'Scintillation'

2.5

F

1

S

>36

N

'Yates' Red'

3.5

F

1

S

<12

B

'Sefton'

2.5

G

2

S

>36

N

'Yates' Second Best'

2.5

P

0

P

>36

N

'Shaazam'

4.0

F

3

P

>36

N

'Yellow Sunbeam'*

7.0

F

3

S

<12

N

* Name is not registered.