Upload a leaf · Get a diagnosis

How Royal Plant Doctor Works

You upload a photo of the symptom — yellowing leaves, brown tips, bugs on the underside, white powder on flowers, anything off. Optionally tell Royal Plant Doctor what stage your plant is in, how long it's been growing, your environment (indoor tent size, lights, medium), and what you've already noticed. The AI vision model analyzes the image and your context, then returns a structured diagnosis in 10-15 seconds.

Every diagnosis includes: a specific issue headline, the category (nutrient / pest / water / light / pH / mold / genetic / other), an honest 0-100 confidence score, severity (mild / moderate / severe), a 1-2 sentence biological explanation, 3-5 specific fix steps with measurements, a recovery timeline in days, optional nutrient recommendations with dosage hints, 2-3 things to watch for, and 1-2 alternative causes you should consider if the primary diagnosis doesn't match your situation.

What Issues It Catches

• Nitrogen deficiency · pale yellow lower leaves
• Phosphorus deficiency · purple stems, dark blotches
• Potassium deficiency · brown burnt leaf tips
• Calcium / magnesium lockout · brown spots, interveinal yellowing
• Iron / zinc / manganese deficiencies
• Nutrient burn · brown leaf-tip burn from over-feeding
• pH lockout · symptoms from too-low or too-high pH
• Overwatering · droopy leaves, root rot risk
• Underwatering · crispy dry leaves
• Light burn · bleached tops, taco-curled leaves
• Light stress · stretching, hermie risk
• Spider mites · webbing, stippled leaves
• Thrips · silvery scrapes on leaf surface
• Aphids · clusters on new growth
• Fungus gnats · adult flies, damaged roots
• Powdery mildew · white powder on leaves
• Bud rot / botrytis · brown necrotic flower
• Hermaphrodite traits · nanners, seeds in flower

The “Talk to Your Plant” Follow-up

After the initial diagnosis, the conversation isn't over. You can ask Royal Plant Doctor follow-up questions specific to YOUR plant. Examples: “What if I already fed nutes yesterday?”, “I'm in week 4 of flower, is it too late to flush?”, “Can I still save the lower leaves or just defoliate?”, “The pH was 6.8 when I watered, is that the real issue?” The AI keeps the original diagnosis as anchor context so its answers stay tied to your actual situation.

Tips for Better Diagnoses

• Use natural daylight — Fluorescent and HID grow lights distort leaf color. Take the photo near a window or outside if possible.
• Get close — Fill the frame with the symptom. A wide-shot of the whole plant gives the AI less to work with than a tight crop of the affected leaves.
• Include a healthy leaf for comparison — If part of the plant looks healthy, get both healthy and sick leaves in the same shot. Comparison is huge for diagnosing deficiencies.
• Write specific observations — In the observations field, say what changed and when. "Started 3 days ago after I switched to bloom nutes" is 10x more useful than "leaves yellow".
• Mention your pH and EC — If you have those numbers, include them in observations. Most cannabis problems are downstream of pH being off.

Royal Plant Doctor FAQ