Plant Symptom Checker (Leaf Diagnosis)
Pick where the symptom appears and what it looks like — get the likely deficiency, disease or pest with a treatment suggestion.
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Why Location Is Half the Diagnosis
Plants relocate mobile nutrients (N, P, K, Mg) from old leaves to new growth — so their deficiencies show on older, lower leaves first. Immobile nutrients (Fe, Zn, Mn, B, Ca) cannot move, so shortages hit the youngest leaves and growing tips. That single observation cuts the possibilities in half before you even look at the pattern: uniform yellowing points to nitrogen or sulfur, green veins on a yellow blade to magnesium or iron, edge scorch to potassium or salt.
Pests and fungi leave signatures instead: powdery coating (powdery mildew), sticky honeydew with ants (aphids), fine webbing (spider mites), winding white tunnels (leaf miners). The tool walks location → appearance and returns the most likely cause, look-alikes to rule out, and a first treatment step.
Frequently Asked Questions
How certain is the diagnosis?
Visual diagnosis narrows the field but overlaps exist — iron and manganese chlorosis look similar, and virus mosaics mimic nutrient patterns. Leaf/soil analysis or an agronomist confirms; treat this as a strong first hypothesis.
Multiple symptoms at once — which do I pick?
Diagnose the earliest/dominant one first; secondary symptoms often follow from it (a root problem shows as many leaf issues). Run the tool once per distinct symptom and look for a common cause.
The deficiency treatment did not work — why?
Often the nutrient is present but locked out: high pH blocks iron/zinc, cold soil blocks phosphorus, drought blocks calcium transport. Fix the uptake condition, not just the fertilizer.
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Plant Symptom Checker (Leaf Diagnosis)