Gardening Groups

Edmonton Horticultural Society
Strathcona County Garden Club
Communities in Bloom (local chapters)
Edmonton Native Plant Society (Edmonton) 

Greenhouses & Nurseries

Salisbury Greenhouse (Sherwood Park)
Greenland Garden Centre (Sherwood Park)
Country Roads Greenhouse (Sherwood Park)
Estate Gardens (Sherwood Park)
Thiel's Greenhouses (Bruderheim)
The Enjoy Centre - Holes Greenhouses (St. Albert)
Deb's Greenhouses (Morinville)
Cheyanne Nursery (Beaumont)
Mill Creek Nursery (Edmonton)
TreeTime.ca (Online, based in Edmonton)
Edmonton Native Plant Society (Edmonton)
Sunstar Nurseries (Edmonton)
Clark Ecoscience - Native Plants (Edmonton, Beaumont)
Wild About Flowers - Native Plants (Online, based in Calgary)

Arborists

Arborman Tree Services
Chipps Tree Services

Landscape Suppliers

Whitemud Landscape Centre - hardscaping, soils, mulches (Edmonton)
Shippers Supply - for cardboard for sheet mulching (Edmonton)