Grow diary
Log each day with notes, photos and milestones. Colour-coded phases show exactly where you are.
Grow diary · Offline-first PWA
Your grow diary, from seed to harvest.
A calm grow diary for cannabis growers — dated entries, photos, a visual timeline, light planning and a tent planner. It runs in your browser, works offline, and keeps every plant on your own device.
No account
Works offline
Free & open source
Your data, your device
Features
Everything the grow needs, nothing it doesn't
A focused toolkit for tracking a plant's whole life — visual, quick to log, and calm to use.
Visual timeline
Every phase at a glance, with collapsible weeks, a today marker and entries for any day.
DLI light planning
Week-by-week Daily Light Integral targets, tuned separately for autos and photoperiods.
Smart reminders
Watering and feeding reminders with buffer days, so nothing slips through.
Tent planner
A top-down view of your space. Drag pots or let auto-arrange find the layout.
Photo gallery
Watch the plant transform in a slideshow with day, week and phase for every shot.
Reports & export
A standalone HTML report, Markdown for forums, or post straight to Overgrow.
Works everywhere
Phone, tablet or desktop — online or off. Installable as an app, no store needed.
The timeline
Your grow, laid out clearly
Every phase in one calm view. Tap any day to add a note, a photo, or a quick update — past or future.
- All phases at once, germination to harvest
- Collapsible weeks keep long grows tidy
- Today is always marked
Day 45 · Week 7
GermSeedlingVegFlowerFlush
Day 42 🌿 Fed · half-strength bloom
Day 44 💧 Watered · 1.2 L each
Day 45 📷 Photo · buds fattening
Light planning
Dial in the light with DLI
Enter your light's PPFD and hours to get a Daily Light Integral, with phase-specific targets so plants get what they need — no burn, no shortfall.
DLI · flower week 3
51.8
mol/m²/day
PPFD 80018 h → 12 hin range
Tent planner
Plan the space before you fill it
Set your tent size once, then drag pots into place — or let auto-arrange bin-pack the largest first. A red outline warns when a pot won't fit.
- Pot sizes from 3 L to 50 L
- Drag-and-drop, with a top-down view
- One-tap auto-arrange
100 × 100 cm · 4 plants
Photo gallery
Watch the whole journey back
Add photos to any entry and replay the grow as a slideshow — a moving phase marker and the day, week and phase shown for every shot.
- Swipe through the full history
- Auto-play for hands-free viewing
- Stored on-device in IndexedDB
Gallery
Community
Visit Overgrow 🌳
Part of the Overgrow community
Share a finished grow straight to Overgrow — the app pre-fills a forum topic with your report, stats and photos. One of the friendliest places on the web to grow.
Support
Free, and staying that way
OG Grow Journal is a non-profit project — no ads, no paywalls. If it helps your grow, you can chip in toward its development.
Ready when you are
Start your grow diary
No sign-up, no download. Open it in your browser and log day one.
Open OG Grow Journal