Plant, Weed and Pest Databases

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What plant should I grow where? What plant is this in my garden? What types of plants grow well in shade or in certain soils? What bug is that? Why are my vegetables not thriving? All these questions and more can often be answered by searching a reputable plant, weed or pest database. We suggest you try one of these:

Bug Guide – Identification, Images, & Information for Insects, Spiders etc for the US & Canada

Ugly Leaves may mean Disease – great charts to help with problems of onions, cucumbers, melons and tomatoes.

Cornell University Pest Weed and Disease identification and control 

Cornell University – Pests and Integrated Pest Management

Friends of the Garden – extensive list of Plant Databases – Feb 2017  – this is an awesome collection of available plant databases for North America. Well organized, with links not only to the main plant databases but also specialty categories such as Iris, Daylily, Hosta etc. Kudos to Barbara Clark and Friends of the Garden.

Michael Pascoe’s World (and Canada) Plants

Michigan Flora database – intended both to be an evolving illustrated companion to the Field Manual, presenting photographs of the species and their diagnostic features, and build on the foundation of the Field Manual by incorporating updates and new discoveries.

Michigan State University – Turf Diseases

Mushroom Expert (good for ID of mushrooms but also has very extensive Tree list & pics too)

Native Plant Database

Native Plant Choices and Sources (local zone 5-6 Southwestern Ontario, Canada)

Northern Ontario Plant Database

Ontario Rock Garden Society

Ontario Trees and Shrubs

Ontario Weeds 

Ontario Wildflowers

Professional Lawn Care Association


Downloadable Weed Guide 

OMAFRA Weeds and Insects

Ontario Crop Integrated Pest and Weed Management

The Plant List – is a working list of all known plant species. It aims to be comprehensive for species of Vascular plant (flowering plants, conifers, ferns and their allies) and of Bryophytes (mosses and liverworts). Collaboration between the Royal Botanic Gardens, Kew and Missouri Botanical Garden enabled the creation of The Plant List by combining multiple checklist data sets held by these institutions and other collaborators.

 What Tree is It – great site for identifying trees – by Leaf, by Fruit, by Name (common or scientific)

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