Website/Catalog  (16 Feb 2021)  
 
https://www.stuff.co.nz/manawatu-standard/news/117841605/top-roses-revealed-at-palmerston-north-trial-grounds

An intense shade of burgundy with glossy green leaves and fragrance, the rose is named "Grandma's Rose" in honour of his mother Valerie Somerfield.  It was the grandchildren's idea to pay tribute to their 81-year-old grandmother, who thought it was "her colour".  "When we asked her permission, she loved it and carried the rose around for ages, sniffing and admiring it," Somerfield said.  His win was announced at the New Zealand Rose Society's international rose trial grounds at the Victoria Esplanade in Palmerston North on Sunday.  Somerfield said the new rose was a seedling crossed by hand pollination with "Betty Harkness", an orange rose.

Book  (2020)  Includes photo(s).
 
John Ford. NZRS International Rose Trial 49.
p49. Gold Star of the South Pacific.  Grandma's Rose (Somvalerie). 72.0 points. Hybrid Tea, bred by Rob Somerfield, Glenavon Roses. Trial No. 5034.  This unusual coloured rose attracted my attention early on in the piece, it seemed neither a true red nor a purple but somewhere in between. The large flat romantic type HT blooms  were quite prolific on a sturdy, plant with excellent habit, dark glossy foliage that offset the colour of the blooms well. A few issues came to light over the two years, the first was the flowers tended to burn and fade in the high UV light of the spring and was subject to rust and a bit of blackspot. In saying  that, I am looking forward to this rose being released and growing in the garden.

p54.  Trial Ground No. 5034. Score 72.0. Grandma’s Rose (Somharknum) HT.  Breeder Somerfield.  Entrant Glenavon. Red.

Book  (2010)  Page(s) 154.  Includes photo(s).
 
p153.  Photo Grandma's Rose

p154. Rob Somerfield pf Tauranga was awarded the Gold Star of the South Pacific for Grandma's Rose (Somvalerie), a red/purple coloured named for Rob's mother.