York Region	Fusion Gardening® combines textures and colours to create an oasis which is sustainable.
Ontario Horticultural Association	All of the garden and horticultural clubs in Ontario are listed on their website.
Ontario Ministry of Agriculture, Farming and Rural Affairs	OMAFRA has a lot of information for home gardeners, including organic gardening guide, pest control, weed identification, and the 2009 Pesticide Ban.
Toronto Botanical Garden	This garden is closest to York Region and offers several display gardens, tours, courses and workshops, children’s camps and an excellent horticultural library. Many horticultural societies meet at this venue.
Evergreen	Non-profit promoting green spaces in urban areas, including school grounds, , and greater use of native plants in landscaping. They offer a native plant database and fact sheets on invasive species that continue to be planted in home landscapes.
​Ontario Plants	A labour of love by Walter Muma, this website provides a database of Ontario native and alien plants, groups by trees & shrubs, wildflowers, ferns grasses, mosses and insects. Site can be searched on a range of attributes, such as name, habitat, leaves, flower season or colour and so on.
Weed Identification	This site provides a database of weeds in Canada, with an identification key to enable search based on physical characteristics.
Lake Simcoe Region Conservation Authority	LSRCA spans from north of Lake Simcoe south to Caledon, King, Aurora, Whitchurch-Stouffville, Uxbridge and Scugog. LSRCA offers education programs,  information on the watershed, grants for listed projects, subsidizes native trees.
Toronto Region Conversation Authority	TRCA spans from Lake Ontario up to Brampton, Caledon, Vaughan, Richmond Hill, Markham and east to Ajax.
LEAF	Non-profit offering help with planting trees on your lot. The tree cost is subsidized and they offer support or full tree planting services for specific areas.
North America Native Plant Society	NANPS offers an informative speaking program, plant rescue at major development sites and a database of native plants (though it’s not an exhaustive list). There are plants sales every year, the largest of which is at the Markham Civic Centre in May. Check the website for more information.
Invasive Plant Council of Ontario	A multi-sector non-profit promoting collaboration to address the threat of invasive plants in Ontario. Plant Me Instead program educates homeowners on alternatives for popular invasive species.