The Royal Horticultural Society is a UK charity established to share the best in gardening. Their work is driven by a love of plants and the belief that garden and gerdeners make the world a better place.
The Royal Horticutual Society
The RHS website has a near endless supply of hints, tips and advice for gardeners of all levels, no matter whether you have a small home harden, allotment or a palatial estate...
Some of the links here may be more related to gardens, but the basic principals of horticulture apply just as mch to allotments as to home gardens.