Select Unregulated Invasive Plant Species in Ontario from the Office of the Auditor General of Ontario:
| Common Name | Botanical Name |
| Photo with Link to removal strategy. Please note: some links lead to a U.S. site which have different laws re use of an herbicide. Please follow all Ontario (Cosmetic Pesticide Ban) & Canadian pesticide laws. | |
| Amur Maple | Acer ginnala |
| Common Buckthorn | Rhamnus cathartic |
| Creeping Jenny | Lysimachia nummularia |
| Dame’s Rocket | Hesperis matronalis |
| Daylily | Hemerocallis fulva |
| English Ivy | Hedera helix |
| Glossy Buckthorn | Rhamnus frangula |
| Goutweed | Aegopodium podagraria |
| Italian Honeysuckle | Lonicera caprifolium |
| Japanese Barberry | Berberis thunbergii |
| Japanese Honeysuckle | Lonicera japonica |
| Japanese Spurge | Pachysandra terminalis |
| Lily of the valley | Convallaria majalis |
| Manitoba maple | Acer negundo |
| Maiden Grass, Chinese Silver Grass, Japanese Silver Grass, Susuki Grass, or Eulalia Grass | Miscanthus |
| Multiflora Rose | Rosa multiflora |
| Norway Maple | Acer platanoides |
| Oriental Bittersweet | Celastrus orbiculatus |
| Ornamental Honeysuckle | Lonicera periclymenum |
| Periwinkle | Vinca minor |
| Russian Olive | Elaeagnus angustifolia |
| Sea Buckthorn | Hippophae rhamnoides |
| Spearmint | Mentha spicata |
| Tree of Heaven | Ailanthus altissima |
| White Mulberry | Morus alba |
| Winged Burning bush | Euonymous alatus |
| Wintercreeper | Euonymus fortunei |
| Winged Archangel | Lamium galeobdolon |
Halton region Master Gardeners 