The National Allotment Society is the leading UK organisation upholding the interests and rights of the allotment community. They work with government at national and local levels, other organisations and landlords to provide, promote and preserve allotments for all. They offer support, guidance and advice to our members and those with an interest in allotment gardening. The US counterpart is the American Community Gardening Association.
Why? The British history of allotment gardening runs back three centuries, so they have as much experience as anyone. The Society hosts a great collection of resources on how to run an allotment garden.