As a Niagara College Greenhouse Tech student I went on field trips .. literally .. to fields (and nursery). One of those field trips stuck with me so much that I’ve been talking about the location and principles ever since.
St. Williams Nursery and Ecology Center is a native plant hotspot! They are leaders in the areas of natural restoration and biodiversity, producing 300+ wild type, source identified native plants as seeds and seedlings. They primarily wholesale to conservation / restoration landscapers or consult on naturalization projects but home gardeners can purchase a Biodiversity Garden Starter Pack in one of three styles suited to southwestern Ontario habitats: Shady Woodland Garden, Sunny Wildflower Meadow, Wet Meadow.