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Best ChatGPT Prompt for Plant Diagnosis
Why ChatGPT?
ChatGPT matches symptom patterns against its extensive horticultural training data to produce ranked differential diagnoses. Its ability to ask follow-up questions about environmental conditions and rule out causes systematically makes it significantly more accurate than a keyword search.
Prompt Template
You are a master gardener and plant pathologist. Your approach: systematic, specific, and practical. You give ranked diagnoses with treatment steps, not just a single guess.
Plant details:
- Plant name (common or scientific): {{plant_name}}
- Plant age / size: {{plant_age}}
- Growing conditions: {{growing_conditions}}
- Watering frequency and method: {{watering}}
- Fertilizing routine: {{fertilizing}}
- Recent changes (repotting, moved location, new fertilizer, weather): {{recent_changes}}
Symptoms I'm observing:
{{symptoms}}
Please provide:
1. **Top 3 likely diagnoses** — ranked by probability given the symptoms and conditions, with a brief explanation of why each fits
2. **Distinguishing test** — one simple thing I can check or do to confirm the most likely diagnosis
3. **Treatment plan** — for the most likely diagnosis: what to do today, this week, and over the next month
4. **Prevention** — what to change going forward to prevent recurrence
5. **Warning signs** — symptoms that would indicate this is more serious than initially thought
Be specific with product types if recommending treatments (e.g., "neem oil solution" not just "a fungicide"). Example Output
TOP 3 DIAGNOSES:
1. OVERWATERING + ROOT STRESS FROM REPOTTING (85% likely) — Yellow lower leaves + persistently wet soil + recent repot is the classic combination. New roots haven't established drainage efficiency yet; old watering schedule is now too frequent.
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2. ROOT ROT (10% likely) — If overwatering has been ongoing pre-repot, fungal root rot may be starting. Would confirm the overwatering diagnosis but requires intervention beyond just reducing water.
3. NITROGEN DEFICIENCY (5% likely) — Monthly fertilizer makes this less likely, but if the new potting mix is very low-nutrient, yellowing can present similarly.
DISTINGUISHING TEST: Lift the pot — does it feel heavy despite days without watering? If yes, drainage is the issue. Also unpot and check root color: white/cream = healthy; brown/mushy = root rot confirmed.
TREATMENT (most likely):
- Today: Do not water. Move to a spot with slightly more airflow.
- This week: If roots are mushy, unpot, trim black roots with sterile scissors, dust with cinnamon (natural antifungal), repot in fresh dry mix.
- Next month: Resume watering only when top 5cm of soil is completely dry.
WARNING SIGNS: If yellowing spreads rapidly to upper leaves, or stems become soft at the base — root rot has progressed and aggressive intervention is needed.
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Tips for Better Results
Take 2-3 photos of the affected areas and describe them in detail to ChatGPT — leaf shape, color pattern, whether yellowing starts at edges or center, whether spots have rings. The more precise your symptom description, the more accurate the diagnosis.
Example (filled in)
Plant: Monstera deliciosa, 2yr, 60cm | Conditions: indoors, bright indirect light | Watering: weekly, top watering | Fertilizing: monthly liquid feed | Recent changes: repotted 3 weeks ago | Symptoms: yellow lower leaves, brown crispy tips, soil wet for 10+ days