UK Garden Directory - Listings of gardeners, garden Centres and online stores; also featuring a forum for help and advice. - http://www.gardeners.co.uk/
Leisure and Living: Horticulture - Directory of garden centres, nurseries, landscape gardeners and horticultural products suppliers. - http://www.martex.co.uk/horticulture/
Gardenworld - Compendium of UK garden centres, with extensive gardening links, tips, articles, a list of events, a searchable directory of over 600 garden centres and online bookshop. - http://www.gardenworld.co.uk/