A free plant health check. Describe what you see, or answer one question at a time to work down the key to a pest, disease, nutrient problem or growing condition. Identification is free. Prevention and treatment for each crop are on the Home and Pro plans.
About this tool: how the key worksEach question splits the possibilities into a few groups by something visible on the plant: where the damage started, what it looks like, what is on the roots. Each answer leads to the next question until one problem is left. Answered questions stay on the page above the open one, and choosing one reopens it to try a different branch.
The box at the top compares a description with the words growers most often use for each problem and lists the closest three. It reads plurals, common misspellings and "no webbing"-style negatives. A crop, picked or named in the description ("brown tips on my strawberry leaves"), moves up the problems common on that crop and the usual cause of the symptom there. When two matches are close, one question built from the sign that sets each apart helps choose between them. A match is a starting point: "Confirm in the key" fills in the answers that lead to it and opens the last question, where it sits beside the problems most like it.
Matching runs in the browser and is not driven by AI. Nothing typed leaves the device unless you rate the matches; a rating sends the description, the crop and the matches to Bizon, with no account details, so poorly matched descriptions can be found and fixed. The privacy policy has the details.
Photos come from Wikimedia Commons and Flickr under licenses that allow reuse, and each result credits its photographer and license.
The key narrows things down; it does not replace a lab. Each result lists the signs that confirm it and the problems most often mistaken for it. For a disease on a high-value crop, a plant diagnostic lab (most state extension services run one) confirms the cause for a small fee. Nutrient problems are best confirmed with a soil, media or leaf tissue test.
On the Home and Pro plans each result adds what brings the problem on, how to prevent it, and treatment options in the order to reach for them: cultural first, then biological, then chemical. Chemical options name active ingredients and their resistance groups rather than brands. Product labels differ by crop, site and state, and the label is the legal word on any product.