Soil, manure, composts
Londonorganicsoil.co.uk - Affordable bulk buy in south London
Thompsons - Bulk buy for large quantities.
West Riding Organics - Bulk buy seed and cutting composts, plus potting compost.
Pots, trays, tools, irrigation etc
LBS Horticulture - Trade site for all trays, pots, planters, tools, canes, labels etc
Harrod Horticultural - Retail site for gardening tools, sundries and more.
www.firsttunnels.co.uk - Great value tunnels and helpful advice for installing.
Organic Garden Catalogue - Good selection, plus lots of other products.
Tamar organics - Organic seeds, great selection.
Franchi, Italian seeds - Generous packets, interesting varieties.
Thomas Etty - Heritage varieties.
Stormy Hall - Open pollinated, biodynamic seeds.
Real Seeds - Open pollinated and organic seeds, good varieties including many unusual.
Nicky's Nursery - Good selection, many interesting herbs both culinary and medicinal.
Kings Seeds / Suffolk Herbs - Wide selection of vegetable and herb seeds. Discounts for groups.
Fruit Trees and bushes
Blackmoor Nursery - Great selection, bare root and container plants.
Edulis - Amazing selection of perennials, many unusual varieties suitable for permaculture gardens.
Keepers Nursery - Huge variety bare root fruit (available november - april).
Foxhollow Nurseries - Bulk buy a great variety of 9cm herb plants.