Texas Extension Publications Index

Canadian Gardening

Fruit Gardener

Garden Gate Magazine

Sales of bonsai trees, seeds, pots, tools and sundries
Midlands Bonsai, Stoke-on-Trent, Staffordshire

Searchable database of plants, with detailed information and growing tips. Search on flower colour, soil type, hardiness, foliage colour and more
BBC Plant Finder

Site includes a large, informative section on growing perennials, biennials, climbers, wild flowers, annuals, bulbs and other flowers
Paul's Garden World

Growers of hardy perennial plants for the cottage garden, plus vegetable plants and seeds
Cottage Garden Plants Direct, Strabane, Co. Tyrone

Ornamental trees, shrubs, hedging plants, fruit trees, conifers, ornamental grasses, ferns and gift ideas 
Mail Order Trees, Ely, Cambridgeshire