What is PlantGrail?
PlantGrail is a houseplant care website and an iPhone app. The website publishes care guides and problem pages for common houseplants; the PlantGrail app tells you what is wrong with a plant from one photo. Both draw on the same knowledge base, which held 4,889 care records across 738 plant names as of . PlantGrail is run by MCLABS XYZ.
What does a knowledge record mean?
A Grail record has an identifier, a plant label, a problem, and compiled guidance. Several records can describe the same plant or related problems. A record is not an independent treatment trial, an observed death, or a successful recovery. Plant labels include species, cultivars, genera, and broader groups.
Where does the information come from?
The library combines botanical and horticultural references with compiled care observations. Automated tools assist collection, organization, and drafting. Source lists and internal record identifiers are starting points for checking a claim; their presence alone does not establish that every statement has been independently verified.
For numerical research claims, readers should be able to inspect the underlying dataset or published study, including its population, methods, denominator, and observation dates. Care instructions should link to a relevant public reference. We are reviewing older guides against that standard and correcting unsupported claims.
How certain are the results?
Internal scores help organize the knowledge base. They are not calibrated probabilities of diagnosis accuracy or plant survival. Advice must be interpreted alongside your plant’s symptoms, light, moisture, root condition, and care history. A single symptom can have several causes.
Open data and corrections
Our 2026 care-record census includes a downloadable dataset. It describes the library’s coverage, rather than mortality in a population of houseplants. Earlier unsupported death and recovery figures have been withdrawn.
Publication dates identify the original guide. An updated date identifies a substantive revision, rather than an automatic refresh. Corrected translations require their own review.
How can I report a mistake?
Use our contact page to report a factual error, an inaccessible reference, or advice that needs clarification. Include the guide URL and the specific claim or observation.
Commercial links
Some pages include affiliate links, we sell courses, and the PlantGrail app has a paid Premium plan. These commercial relationships do not establish the effectiveness of a product or treatment. Check product labels and the references supporting an individual recommendation.