Table 4. Winter injury observations and mid-winter hardiness ratings for rose cultivars, 1988-91.

Hardiness Rating: The hardiness rating is the lowest temperature at which 50 percent of the stem sections were uninjured. A “+” following a hardiness rating indicates that canes were uninjured at the lowest test temperature. The designation “(G)” next to the year indicates that cold hardiness determinations for that cultivar that year were taken from container-grown plants in an overwintering greenhouse. The designation “(I)” under the Fahrenheit and Celsius columns indicates that the canes were injured in the field prior to collection. A “—” under a winter injury column indicates that data for that variety was not recorded for that year.

Cultivar Winter Injury Mid-Winter
Hardiness Rating
Year
1988-89 1989-90 1990-91 Fahrenheit Celsius
Albas
Alba semi-plena none tip (I) (I) 1994
Belle Amour snow base snow      
Chloris none      
Jeanne d’Arc none snow      
Königin von Dänemark base snow      
Mme. Legras de St. Germain snow -32
(I)
-36
(I)
1991 (G)
(I) 1991
Pompon Blanc Parfait snow      
Bourbons
Gipsy Boy none tip snow      
Mme. Ernest Calvat none snow      
Centifolias
Blanchefleur none      
Bullata none base snow      
Cabbage Rose      
Centifolia Variegata none snow      
Fantin-Latour base snow      
Petite de Hollande none base snow      
Prolifera de Redouté snow      
Red Provence snow snow      
Rose de Meaux snow base dead      
Rose des Peintres none base snow      
Tour de Malakoff base snow      
Damasks
Autumn Damask base snow      
Césonie snow      
Kazanlik snow base snow      
Léda snow snow -26
-30
(I)
-32
-34
(I)
1990 (G)
1991 (G)
1991
Mme. Hardy none base -32
(I)
-36
(I)
1991 (G)
1991
Marie Louise snow      
Omar Khayyám snow      
Rose de Rescht snow base snow -24 -31 1990 (G)
St. Nicholas snow snow      
York and Lancaster snow snow      
Floribundas
Chuckles base snow      
Dapple Dawn base      
Eutin base (I) (I) 1994
Nearly Wild snow base snow (I)
(I)
(I)
(I)
1991
1994
Redcoat base      
Gallicas
Alain Blanchard tip base snow      
Alice Vena snow snow      
Alika none tip none      
Belle des Jardins snow tip      
Belle Isis snow snow      
Cardinal de Richelieu none snow      
Charles de Mills none base snow      
Désireé Parmentier snow      
Duchesse de Montebello none -28 -33 1990 (G)
Narcisse de Salvandy none base snow      
Président de Sèze none snow      
Rosa Mundi none snow      
Rose du Maître d’École none base snow      
Superb Tuscan none base snow      
Tuscany base base      
Grandifloras
Earth Song base      
Hybrid Albas
Mme. Plantier none base tip      
Hybrid Blandas
Betty Bland none tip tip -36 -38 1991
Hybrid Caninas
Andersonii tip snow (I) (I) 1991
Hybrid Foetidas
Harison’s Yellow none none none -38 -39 1991
Hybrid Moyesiis
Marguerite Hilling tip snow (I) (I) 1991
Nevada tip snow (I) (I) 1991
Hybrid Musks
Ballerina base      
Belinda base base snow      
Daphne snow base snow      
Will Scarlet base snow      
Hybrid Nitidas
Aylsham tip tip      
Metis tip tip (I) (I) 1991
Hybrid Perpetuals
Baron Girod de l’Ain snow base snow -24
-28
-31
-33
1990 (G)
1991 (G)
Frau Karl Druschki base base      
Mme. Scipion Cochet base snow      
Mrs. John Laing snow base snow (I) (I) 1991
Reine des Violettes none snow      
Hybrid Rugosas
Agnes none tip none -40+ -40+ 1991
Amelia Gravereaux snow snow (I) (I) 1991
Belle Poitevine tip -32 -36 1991
Blanc Double de Coubert none snow -34 -37 1990 (G)
Bonavista snow snow      
Charles Albanel base none -40 -40 1991
David Thompson tip -32 -36 1991
Delicata none base      
Elmira snow snow      
Frau Dagmar Hartopp none -34
-34
-37
-39
1990 (G)
-1991
George Will none (I) (I) 1991
Grootendorst Supreme tip      
Hansa none -28
-40+
-38
-33
-40+
-39
1990 (G)
1991
1991
Henry Hudson tip none -36 -38 1991
Hunter snow base snow (I) (I) 1991
Jens Munk none -36 -38 1994
Martin Frobisher none tip (I)
-22
(I)
(I)
-30
(I)
1991
1991
1994
Moncton snow snow      
Mrs. John McNabb none tip      
Pink Grootendorst none base snow      
Rose à Parfum de l’Hay none base snow      
Rugosa Magnifica none none none -24
-34
-31
-37
1990 (G)
1991
Sir Thomas Lipton tip -30
-34
(I)
(I)
-34
-37
(I)
(I)
1990 (G)
1991 (G)
1994
Thérèse Bauer tip tip      
Thérèse Bugnet none none -20
-34
-29
-37
1990 (G)
1991
Will Alderman tip tip      
Hybrid Spinosissimas
Frühlingsanfang tip (I) (I) 1994
Frühlingsduft none tip (I)
(I)
(I)
(I)
1991
1994
Frühlingsgold tip (I)
(I)
(I)
(I)
1991
1994
Karl Förster tip (I) (I) 1991
Suzanne none none -44 -42 1991
Wildenfelsgelb none tip (I) (I) 1991
Hybrid Suffultas
Assiniboine none tip -38 -39 1991
Cuthbert Grant base snow (I) (I) 1991
Kordesiis
Alexander von Humboldt none base snow      
Dortmund snow base snow -26
-30
-32
-34
1990 (G)
1991 (G)
Henry Kelsey tip (I) (I) 1994
Illusion snow base snow      
John Cabot none (I)
(I)
(I)
(I)
1991
1994
John Davis tip -22 -30 1994
Karlsruhe snow base snow      
Parkdirektor Riggers      
Rote Max Graf snow base snow      
William Baffin none none none -26 -32 1994
Miscellaneous Old Garden Roses
Juno snow      
Mosses
Black Boy snow snow      
Capitaine John Ingram none snow      
Chevreul base snow      
Communis none      
Comtesse de Murinais snow snow      
Deuil de Paul Fontaine snow base snow (I) (I) 1990 (G)
Duchess de Verneuil tip snow      
Gabriel Noyelle snow base snow      
Général Kléber snow snow      
Gloire des Mousseuses snow base snow      
Goethe tip snow      
Gracilis tip snow      
Henri Martin none      
Jeanne de Montfort snow base snow      
Julie de Mersan none snow      
Laneii tip      
Louis Gimard      
Mme. de la Rôche-Lambert none snow      
Mme. Louis Lévêque snow base snow      
Mossman none base tip      
Nuits de Young none snow -26 -32 1990 (G)
OEillet Panacheé none base tip      
Perpetual White Moss snow base snow      
Robert Léopold none snow      
Salet snow snow -20
-30
(I)
-29
-34
(I)
1990 (G)
1991 (G)
1991
Violacée none snow      
Waldtraut Nielsen tip base snow      
White Bath none base snow      
William Lobb base snow -26 -32 1990 (G)
Shrub Roses
A. MacKenzie tip (I) (I) 1994
Adelaide Hoodless snow (I)
(I)
(I)
(I)
(I)
(I)
1990 (G)
1991
1994
Alchymist snow base snow      
Amiga Mia base      
Applejack tip tip      
Blue Boy base base      
Bonica snow base snow (I) (I) 1991
Carefree Beauty snow snow (I)
(I)
(I)
(I)
1991
1994
Chamcook none tip none      
Champlain snow (I) (I) 1994
Country Dancer base      
Golden Wings base snow (I) (I) 1991
Haidee none none none -36 -38 1994
J. P. Connell none      
John Franklin snow base base      
Lillian Gibson none tip (I) (I) 1991
Morden Amorette none snow      
Morden Cardinette base      
Morden Centennial (I)
(I)
(I)
(I)
1991
1994
Morden Ruby tip (I) (I) 1994
Prairie Dawn none none (I)
-33
(I)
-36
1991
1994
Prairie Princess (I) (I) 1991
Prairie Wren none none -33 -36 1994
Prairie Youth tip none tip      
Robusta (I) (I) 1994
Scharlachglut tip snow (I)
(I)
(I)
(I)
1991
1994
Summer Wind snow -26
-30
-32
-34
1990
1991
Von Scharnhorst tip snow      
Species
Dr. Merkeley none tip      
R. ambylotis base none none -40+
-44
-40+
-42
1991
1993
R. arkansana none none      
R. canina tip none none      
R. cinnamomea none tip -44 -42 1993
R. foetida none      
R. foetida bicolor none none (I)
(I)
(I)
(I)
1990 (G)
1991
R. glauca none none tip -26
-27
-33
-32
-33
-36
1991
1993
1993
R. hugonis none tip -30
-22
-34
-30
1991
1993
R. laxa none tip none -38 -39 1993
R. macounii none -38
-27
-39
-33
1991
1993
R. mollis none tip -27 -33 1993
R. multiflora snow base (I) (I) 1993
R. nitida none tip none -42
-38
-41
-39
1991
1993
R. palustris base none -38 -39 1993
R. pendulina none none -40
-33
-40
-36
1991
1993
R. pomifera tip tip -24
-22
-31
-30
1991
1993
R. primula none none none -34
-34
-27
-37
-37
-33
1991 (G)
1991
1993
R. rugosa none none      
R. rugosa alba plena none none      
R. rugosa kamtchatica snow none none -44 -42 1993
R. sertata tip none -24
-22
-31
-30
1991
1993
R. setigera none tip -30
-27
-34
-33
1991
1993
R. spinosissima altaica none none none -42
-33
-41
-36
1991
1993
R. virginiana none none -38 -39 1993
R. woodsii none none -30
-44
-34
-42
1991
1993

Return