Carry on Gardening
Monty Don introduces a site with advice about easier gardening. Includes tools, ideas exchange and how others have adapted their gardens.
Horticulture for All
The Federation to Promote Horticulture for Disabled People introduces their association and gives advice and links.
Thrive
The national horticultural charity empowering disadvantaged, disabled and older people through gardening and horticulture. Runs a number of garden projects, and an expanding regional network.