# Plant Grail

> Plant Grail is an evidence-based houseplant care platform with 20,000+ analyzed diagnosis cases across 500+ species, covering symptom identification, treatment protocols, and seasonal care data.

Plant Grail organizes plant care knowledge into structured, confidence-scored diagnoses derived from peer-reviewed research and community-verified case studies. Each diagnosis includes the problem, cause, fix, and a confidence score reflecting the strength of evidence. The site also offers interactive diagnostic tools, a curated product shop, and structured learning courses (Mastery Packs).

## Plant Grail developer resources

- [Plant Grail OpenAPI specification](https://plantgrail.com/openapi.json): OpenAPI 3.1 document for LLM function calling (operationIds, typed parameters, JSON error schemas)
- [Plant Grail API documentation](https://plantgrail.com/docs/): Authentication, endpoints, example requests, and rate-limit headers
- [Plant Grail developer hub](https://plantgrail.com/developers/): Public REST API, markdown negotiation, and webhook boundaries
- [Plant Grail OpenAPI YAML](https://plantgrail.com/api/openapi.yaml): Alternate spec URL for clients that prefer YAML
- [Contact Plant Grail](https://plantgrail.com/contact/): hello@plantgrail.com for API and editorial questions

## Core Pages

- [Plant Directory](https://plantgrail.com/plants): Searchable index of all tracked houseplants with diagnosis counts, difficulty ratings, and taxonomy filters
- [Problem Diagnosis Index](https://plantgrail.com/problems): All 115 tracked plant problems organized by category — symptoms, pests, diseases, watering, environmental, and rescue
- [Lexicon](https://plantgrail.com/lexicon): Complete reference of all plants (with scientific names and synonyms), problem types, and tracked products
- [About & Methodology](https://plantgrail.com/about): How data is produced, confidence scoring methodology, and editorial standards

## Research & Data Reports

- [State of Houseplant Health 2026](https://plantgrail.com/state-of-houseplant-health-2026): Original research report analyzing 20,000+ plant care cases — top killers, survival rates, recovery correlations, and methodology
- [Houseplant Mortality Report 2026](https://plantgrail.com/articles/houseplant-mortality-report-2026-data-analysis): Data analysis of why houseplants die — the 7 most common killers ranked by frequency with prevention protocols

## Articles — Care Guides

- [Monstera Deliciosa Complete Care Guide](https://plantgrail.com/articles/monstera-deliciosa-care-complete-guide-to-growing-a-healthy-swiss-cheese-plant): Watering, light, humidity, fenestration, and common problems for Monstera Deliciosa
- [Monstera Deep Dive: Science & Fenestration](https://plantgrail.com/articles/monstera-deliciosa-deep-dive-science-care-the-fenestration-mystery): The science behind fenestration development, node anatomy, and growth patterns
- [Snake Plant Complete Care Guide](https://plantgrail.com/articles/snake-plant-complete-care-guide-light-water-and-root-rot-rescue): Light, water, root rot rescue, and propagation for Dracaena trifasciata
- [Pothos Mastery Guide](https://plantgrail.com/articles/pothos-mastery-the-ultimate-care-guide-for-all-varieties): Complete care for all Pothos varieties including Golden, Marble Queen, and Neon
- [Calathea Care Guide](https://plantgrail.com/articles/calathea-care-the-complete-guide-to-keeping-your-prayer-plant-happy): Humidity, light, and browning-edge solutions for prayer plants
- [Philodendron Care Guide](https://plantgrail.com/articles/philodendron-care-complete-from-heartleaf-to-rare-varieties): Care from heartleaf to rare varieties including Pink Princess
- [Fiddle Leaf Fig Complete Care Guide](https://plantgrail.com/articles/fiddle-leaf-fig-complete-care-guide): Light, watering, spider mites, edema, and leggy growth fixes for Ficus lyrata
- [Hoya Complete Care Guide](https://plantgrail.com/articles/hoya-complete-care-guide): Light, watering, blooming triggers, and propagation for wax plants
- [Spider Plant Complete Care Guide](https://plantgrail.com/articles/spider-plant-complete-care-guide): Care, propagation from plantlets, and brown tip prevention for Chlorophytum comosum
- [Alocasia Complete Care Guide](https://plantgrail.com/articles/alocasia-complete-care-guide): Dormancy management, humidity, and pest prevention for elephant ear plants
- [Peace Lily Care Guide](https://plantgrail.com/articles/peace-lily-care-the-complete-guide): Watering, blooming triggers, and toxicity guidance for Spathiphyllum
- [Complete Succulent Care Bible](https://plantgrail.com/articles/the-ultimate-succulent-care-bible-everything-we-need-to-know): Watering, light, soil, propagation, and species-specific care for all succulents
- [Year-Round Plant Care Calendar](https://plantgrail.com/articles/year-round-plant-care-calendar-the-complete-month-by-month-guide): Month-by-month seasonal care adjustments for indoor plants
- [Complete Plant Propagation Bible](https://plantgrail.com/articles/complete-plant-propagation-bible-every-method-that-actually-works): Every propagation method with species-specific success rates

## Articles — Diagnosis & Treatment

- [Houseplant Pest Bible](https://plantgrail.com/articles/houseplant-pest-bible-visual-identification-treatment-guide): Visual identification and treatment guide for all common houseplant pests
- [Root Rot Identification & Treatment](https://plantgrail.com/articles/root-rot-the-silent-killer-of-houseplants-how-to-spot-it-before-it-s-too-late): How to spot root rot early and rescue affected plants
- [9 Root Rot Signs Most People Miss](https://plantgrail.com/articles/9-root-rot-signs-most-plant-parents-miss-until-it-s-too-late): Early warning signs of root rot before visible wilting
- [9 Ways to Revive a Dying Plant](https://plantgrail.com/articles/9-ways-to-revive-a-dying-plant-emergency-protocol-that-works): Emergency rescue protocol for severely distressed houseplants
- [Plant Doctor Symptom Diagnosis Guide](https://plantgrail.com/articles/plant-doctor-symptom-diagnosis-guide-the-complete-diagnostic-flowchart): Diagnostic flowchart for identifying plant problems from symptoms
- [Neem Oil vs Insecticidal Soap](https://plantgrail.com/articles/neem-oil-vs-insecticidal-soap-pest-treatment-comparison): Data-backed comparison of the two most common pest treatments

## Articles — Data-Backed Comparisons

- [LECA vs Soil: 7 Root Health Metrics](https://plantgrail.com/articles/leca-vs-soil-7-root-health-metrics-from-plant-grail-data): Substrate comparison using Plant Grail case data
- [Terracotta vs Plastic Pots](https://plantgrail.com/articles/terracotta-vs-plastic-pots-7-data-backed-differences): 7 data-backed differences for pot material selection
- [LED vs Fluorescent Grow Lights](https://plantgrail.com/articles/7-led-vs-fluorescent-grow-lights-plant-growth-comparison-2026-data): Plant growth comparison with 2026 data
- [Water Propagation vs Soil](https://plantgrail.com/articles/water-propagation-vs-soil-7-differences-that-determine-success): 7 differences that determine propagation success rates
- [Pothos vs Philodendron](https://plantgrail.com/articles/pothos-vs-philodendron): Identification and care differences between the two most confused houseplant genera
- [Snake Plant vs ZZ Plant](https://plantgrail.com/articles/snake-plant-vs-zz-plant): Comparison of the two most popular low-maintenance houseplants
- [Monstera Deliciosa vs Adansonii](https://plantgrail.com/articles/monstera-deliciosa-vs-adansonii): Identifying and caring for the two most common Monstera species

## Articles — Product Roundups

- [Best Grow Lights for Indoor Plants 2026](https://plantgrail.com/articles/best-grow-lights-for-indoor-plants-tested-2026): Tested grow light recommendations with PAR data and price comparisons
- [Best Humidifiers for Plants 2026](https://plantgrail.com/articles/best-humidifiers-for-plants-tested-2026): Humidifier recommendations tested for plant care use cases
- [7 Best Soil Mixes for Aroids](https://plantgrail.com/articles/7-best-soil-mixes-for-aroids-proven-recipes-for-monstera-philodendron-and-more-2026): Tested soil mix recipes for Monstera, Philodendron, and other aroids

## Interactive Tools

- [Tools Hub](https://plantgrail.com/tools): Interactive diagnostic scanners for Monstera and Snake Plant, plus plant identification and wishlist builder
- [Plant Matchmaker](https://plantgrail.com/plant-matchmaker): Quiz to find the right houseplant based on your environment and experience level

## Courses & Learning

- [All Courses](https://plantgrail.com/courses): Structured learning products (Mastery Packs from $37, bundles, and comprehensive courses) built from analyzed case data

## Shop

- [Plant Care Shop](https://plantgrail.com/shop): Community-vetted plant care products backed by case analysis — tools, soil, pest treatments, grow lights

## Newsletter

- [Newsletter Archive](https://plantgrail.com/newsletter): Weekly plant care newsletter with seasonal tips and new research findings