HelpMeFind Roses, Clematis and Peonies
Roses, Clematis and Peonies
and everything gardening related.
DescriptionPhotosLineageAwardsReferencesMember RatingsMember CommentsMember JournalsCuttingsGardensBuy From 
'Graham Thomas' rose Reviews & Comments
Discussion id : 123-795
most recent 7 NOV HIDE POSTS
Initial post 7 NOV by Viviane SCHUSSELE
1805 – 1869 chimiste et médecin anglais, entre autres, pionnier de la dialyse.
Discussion id : 120-944
most recent 14 APR 20 HIDE POSTS
Initial post 14 APR 20 by newtie
G. Thomas is one of a few David Austin "New English Roses" i have found to be worthwhile in the U.S. Gulf Coast Region. Zone 8b. 56 " rain much of it typically in the winter. I have it on its own roots, ~10 years old. Tendency to get leggy unless judiciously pruned. Will climb or can be pruned as a 5-6 ft shrub. Will also cover a wall if offered support such as trellis or wires and good nutrition. One of only three, of the half dozen i have tried that does well here. The others are "The Pilgrim", and "Gertrude Jekyll" the latter is outstanding here if pruned back each year fairly hard and a very important Austin introduction as it is a perfect replacement for the great rose Comte de Chambord which struggles here due to disease.
Discussion id : 104-018
most recent 4 AUG 17 HIDE POSTS
Initial post 4 AUG 17 by Sambolingo
Available from - Old Market Farm
Discussion id : 93-539
most recent 26 JUN 16 SHOW ALL
Initial post 18 JUN 16 by oakslesly
After four years of fighting mildew--in dry southern California--- I am ready to shovel prune this giant. Nothing I have tried gets rid of the mildew. It's in full sun, is huge (six feet by six feet) and blooms constantly. Due to the mildew, leaves and blooms are stunted and unattractive. Suggestions please.
Reply #1 of 1 posted 26 JUN 16 by raingreen
Powdery mildew may be exacerbated by dry soil (too far from spray heads, next to tree roots, etc), but I'm not positive on this (sorry). Heavy feeding with nitrogen may also exacerbate mildew, altho I'm not certain. Based on the 2 plants I've seen in southern California, Graham Thomas is moderately/slightly susceptible to mildew.

In my response you would think I'm a lawyer, but it's just hard to pinpoint causes/solutions to PM.
© 2021