Tell it what you want in plain English and it picks 5 perfect strains from 2,000+ with personalized match scores, drawbacks, and reasons. The flagship tool — predictive, honest, and gets smarter with every session.
Open Royal Strain Finder →Royal King Cannabis Toolkit
Every grower tool in one place
11 cannabis tools built for serious growers — smart recommendation, journaling, identity, plus the classic calculators and comparators. All free, no signup.
✨ Smart Tools
The Intelligence Layer
Adaptive tools that learn from you. Each session sharpens your profile, your archetype, and the picks we surface for you.
Classic
The Workhorses
Deterministic, fast — for when you know what you need and just want the numbers or the ranking.
What each cannabis tool actually does
A one-paragraph map of every tool in the Royal King Seeds toolkit. Click any name to launch it.
Upload a photo of a sick plant and get an instant diagnosis with confidence score, severity, specific fix steps, recovery timeline, and nutrient recommendations. Identifies nutrient deficiencies, pests, water issues, light stress, pH lockout, mold, and more. Includes a follow-up chat to ask plant-specific questions.
Open Royal Plant Doctor →Track each grow from germination to harvest. Get stage-specific advice tailored to your strain, capture real outcomes (yield, quality, rating), and feed the data back into your future recommendations.
Open Grow Journal →Your accumulated preferences — top terpenes, strain-type lean, ideal THC range, archetype name, liked + excluded strains. Built automatically from your Royal Strain Finder sessions and grow outcomes.
Open My Strain Profile →Your year-end cannabis recap — archetype, top terpene with effect blurb, ideal THC range, best grow, total sessions. Shareable with a public link + dynamic OG image for socials.
Open Cannabis Wrapped →The classic 6-step weighted-scoring quiz. Pure algorithm — answer 6 questions and get a deterministic ranking of all 2,000+ strains by fit. Faster than Royal Strain Finder, no free-text nuance.
Open Strain Finder Quiz →Stack up to 4 strains side-by-side across THC, CBD, effects, terpenes, difficulty, yield, and price. Useful when you have 2-3 finalists and need to break the tie.
Open Compare Strains →Estimate your harvest weight from strain, environment (indoor/outdoor), tent size, light wattage, and grow technique. Tells you what to expect before you germinate.
Open Yield Calculator →Per-stage nutrient feeding schedule based on grow medium (soil / coco / hydro), brand of nutes, and plant count. Avoid burn, lockout, and deficiency.
Open Nutrient Calculator →Browse the full Royal King Seeds catalog of 2,000+ feminized + autoflower cannabis seeds. Filter by category, strain type, or THC range.
Open Strain Library →Aggregate lab results, grower reports, terpene data, and category breakdowns. The reference hub for serious growers who want the numbers, not the marketing.
Open Cannabis Data →Coming next
Photo-based plant diagnosis, multi-grower cohort dashboards, custom strain mixing, season-aware planting calendar, and a grow companion that proactively pings you at critical milestones. The platform compounds as the preference graph grows — every grower's reactions, grows, and outcomes sharpen everyone else's recommendations.