Alan Romans is famous for being a potato expert. He now sells "no frills" packets of flower, vegetable and herbs seeds, as well as Scottish seed potatoes.
Association Kokopelli is a French organization dedicated to preserving and distributing heirloom seeds. Their "Seeds of Kokopelli" book is a must-read for serious heirloom gardeners, and over 800 of their seed varieties are available through their online shop.
Chiltern Seeds use the slogan "Grow something new from seed" and their seed catalogue is an endless source of unusual things to grow, both edible and ornamental.
Dobies and Suttons are owned by the same parent company, but carry slightly different ranges of seed. Dobies clearly state that they do not carry genetically modified seeds. Suttons carry a range of interesting exotic seeds (both edible and ornamental) in association with the Eden Project.
D. T. Brown carries a comprehensive range of flower and vegetable seeds, and fruit and vegetable plants. They also have a selection of gardening accessories.
Exhibition Seeds specialize in supplying seed varieties that will grow well enough to be entered into horticultural shows. They also have grass and wildflower seeds.
Kings Seeds have a hefty catalogue of flower, vegetable, herb and sweet pea seeds. A separate online shop sells their range of vegetable plants. Kings are associated with Suffolk Herbs, who specialize in wildflower, country garden flowers, herbs and Oriental vegetables.
Medwyn Williams is a famed vegetable exhibitor with years of experience under his belt. His chosen range of exhibition-quality seeds is available from his online shop.
Nicky's Seeds are only available online. The collection includes a huge range of vegetable seeds, including peppers and Oriental vegetables that are hard to find elsewhere.
The Organic Gardening Catalogue is one of the few seed suppliers that guarantee that all of their seeds are free from chemical treatments. Many of their seeds are organically grown; those that aren't have not been chemically treated after harvest. What's more, each purchase from them supports Garden Organic, the organic gardening charity.
Plants of Distinction have separate catalogues for flower and vegetable seed. Their range of heritage varieties is impressive and they have an especially large collection of peppers (both sweet and chili).
The Real Seed Catalogue is almost unique in that it only supplies seeds that have been grown exclusively for it. All their vegetable varieties have been extensively trialled and are chosen for their ability to perform well in the UK climate. They are all also open-pollinated, and the Real Seed Catalogue encourages you to save your own seeds at home. As well as standard vegetables, the catalogue contains some unusual plants for adventurous kitchen gardeners.
Seeds of Italy supply Italian herb and vegetable seeds, with varieties chosen so that they will grow well in the UK climate. They also have a range of unusual items, such as coffee and risotto rice, if you fancy a challenge.
Sarah Raven is a well-known television gardener and passionate about growing vegetables that are good looking as well as tasty. She also champions cutting gardens and so has a range of flower seeds.
Thompson & Morgan have one of the most comprehensive seed catalogues available, covering both edible and ornamental seeds. For each plant species they have a number of varieties available, so you will have plenty of choice.
Marshalls call themselves the "first choice of Prize Winning Gardeners and Lovers of Real Food". As well as their collection of vegetable seeds they also sell flower seeds, fruit trees and gardening sundries.
The Victoriana catalogue has a very Victorian feel to it and they supply some heirloom varieties along with some distinctly modern seeds. According to their website, they grow and eat all of their chosen varieties themselves.
