Hi Alan , I get a lot of my gardening stuff from wilko's, can't say I have ever had any problems. I love their gardening section. My favourite haunt is the garden centre but sometimes a bit too pricey for some of the things I need. I think you can get bargains in a lot of the shops.
I bort an orchid for three pounds about five months ago and it is only now starting to drop its flowers.
Enjoy your shopping.