www.crocus.co.uk - an online gardening centre. As well as all the plants for sale there are different planting ideas for various effects, situations and temperaments!
www.buckingham-nurseries.co.uk - an online gardening centre, specialising in hedging and trees.
www.bridgemere.co.uk - a huge garden centre in Cheshire.
www.davidaustinroses.com - rose specialist.
www.dobies.co.uk - seeds and plants.
www.suttons-seeds.co.uk - seeds and plants.
www.rhs.org.uk - the Royal Horticultural Society
www.rspb.org - RSPB (Royal Society for the Protection of Birds). Amongst other things there is an A-Z of British birds and some information about gardening for wildlife.
www.uksafari.com - a website for anyone interested in the wildlife and countryside of Great Britain. There are loads of photos.
www.bbc.co.uk/nature/wildfacts - I've used this to check a few identifications.
www.english-nature.org.uk - this site has some information about encouraging wildlife in the garden.
www.metcheck.com - weather forecasts. I use it to work out when would be the best time to mow the lawn!