Alpines - Great site for info on planting alpines in rock gardens, troughs and alpine houses.
Graham's Hardy Plants - An alpine nursery specialising in the rare and unusual alpines espcially western N. American species.
Ice Alpines - Grower of quality alpine and rockery plants.
Laneside Alpines - Largest selection of terrestrial hardy orchids in the UK, wide range of alpine plants and mail order all round Europe.
Pottertons Nursery - Specialist alpine and bulb nursery
Scottish Rock Garden Club - Info on shows run by the SRGC, seed exchange and links to other alpine sites.
Semps by Post - Buy Sempervivum plugs online. Available all year, UK based.
The Alpine and Grass Nursery - Specialist growers of alpines/rockery plants and ornamental grasses. Mail order all year round.
White Cottage Alpines - Specialist growers of alpine and rockery plants.