Hortic - High on Horticulture - A page of horticulture-related links presented as drop-down menus 'built by plants-people for plants-people'. - http://www.hortic.com/
Debby's Garden Links - Links to UK garden-related websites, with useful information for gardeners. - http://www.debbysgardenlinks.co.uk/
GardeningData - - Directory of practical gardening sites and a few articles. - http://www.gardeningdata.co.uk
TheGardenPlanner - Directory of garden design links for the UK. - http://www.thegardenplanner.co.uk/
GardenLinks - Categorised directory of UK-gardening-related links, with a messageboard and tips. - http://www.gardenlinks.co.uk