Allotments
Oxford and District Federation of Allotment Associations (ODFAA)
Allotment Gardens – an excellent private website run by smallholders
Gardening advice
Charles Dowding (vegetable sowing timeline)
Grow Fruit and Veg magazine’s guides to growing
Seeds and plants
CN Seeds (especially for oriental leaves)
Pennard plants (especially for potatoes)
Sea Spring Seeds (especially for chillies)