Here are some links to other sites that I have found interesting or useful.
A web search will reveal a great many others.
Aloha Tropicals Interesting Californian Nursery.
Aspidistra Page by David Constantine. Very useful and informative resource.
Beeches Nursery Great collection of plants.
Cotswold Garden Flowers Extensive eclectic list of plants.
Crug Farm Plants Astonishing modern plant hunters.
Desirable Plants Accurately named growers.
Dibley's Nursery Streptocarpus and other wonders. I admire their achievements immensely.
Constantine Garden Nursery Very wide range of plants .
Ganesh Mani Pradhan Very interesting Indian Nursery .
Le Jardin Ombrage Dave Skinners marvellous Gingers site.
Hardy Exotics Excellent range of spectacular plants.
Insektenfang Forum An interesting and active forum for carnivorous plant growers.
John Grimshaw's Garden Diary One of my favourite garden blogs. I am very envious of John because he writes much better than I do!
Long Acre Plants Extensive range of woodland plants.
Meadowview Biological Research Station Research and conservation of Sarracenia.
Monksilver Nursery Growers of interesting and often overlooked plants.
PJ Plants Excellent nursery and National Collection of Sarracenia.
Plant Delights Nursery The nicest people grow the nicest plants.
Prime Perennials Very interesting range of plants. Very helpful.
Proper Plants. A great range of plants from a charming and knowlegdeable grower.
Roseland House Gardens A great place for climbers and tender plants.
Rowden Gardens National Collection of Ranunculus ficaria.
Shropshire Sarracenias Nursery and National Collection of Sarracenia.
South West Carnivorous Plants Alistair and Jenny Pearce grow an extensive range of very beautiful plants.
The African Garden David Fenwick's fabulous and informative site.
Trecanna Nursery An excellent range of plants, especially Crocosmia.
Tulbaghia Elizabeth Powney's site showing her wonderful national collection.