'Duchesse d'Istrie' rose Description
Photo courtesy of GeorgeZ
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Bred by Jean Laffay
Introduced in France by Portemer
in 1855 as 'William Lobb'.
Mauve or purple blend. Strong fragrance. up to 50 petals. Average diameter 3.5". Large, very full (41+ petals), old-fashioned, quartered bloom form. Once-blooming spring or summer. Mossed buds.
Tall, arching. Matte, medium green foliage.
Height of 6' to 8' (185 to 245 cm). Width of up to 5' (up to 150 cm).
USDA zone 4b and warmer. Can be trained as a climber. Disease susceptibility: susceptible to Mildew. Prune after flowering is finished. Prune lightly until this rose gets established (about two years), then prune it back by about a third..