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'Isobel Harkness' rose Description
'Isobel Harkness' rose photo
Photo courtesy of Margaret Furness
Commercially available
HMF Ratings:
16 favorite votes.  
Deep yellow Hybrid Tea.
Registration name: Isobel Harkness
Exhibition name: Isobel Harkness
Bred by Albert Norman (United Kingdom, before 1950).
Introduced in United Kingdom by R Harkness & Co. Ltd. in 1957 as 'Isobel Harkness'.
Introduced in Australia by Hazlewood Bros. Pty. Ltd. in 1958 as 'Isobel Harkness'.
Hybrid Tea.  
Deep yellow.  Moderate fragrance.  28 to 34 petals.  Average diameter 6".  Very large, full (26-40 petals) bloom form.  Blooms in flushes throughout the season.  
Bushy, upright.  Semi-glossy, dark green, leathery foliage.  

Height: 2' to 30" (60 to 75cm).  Width: 18" (45cm).
USDA zone 7b and warmer.  Disease susceptibility: susceptible to blackspot , susceptible to Mildew.  Spring Pruning: Remove old canes and dead or diseased wood and cut back canes that cross. In warmer climates, cut back the remaining canes by about one-third. In colder areas, you'll probably find you'll have to prune a little more than that.  Requires spring freeze protection (see glossary - Spring freeze protection) .  
United States - Patent No: PP 1,650  on  8 Oct 1957   VIEW USPTO PATENT