Every Plant, Feed, Pheno & Cross Under Control.
Track veg and flower days from seed or clone, dial in pH & PPM runoff drift, compute exact elemental NPK mg/ppm inputs, map multi-generation cannabis pedigrees, and log live room VPD via Govee Bluetooth sensors—100% privately on your device.
Dial in every feed from seedling to flush.
Whether you run hand-watered living soil, high-frequency coco drain-to-waste, or recirculating RDWC reservoirs, PlantMaxer tracks every input and runoff reading.
Know your exact mg & ppm of N, P, K, Ca, Mg & Si
Log water volume, pH in/out, and PPM in/out with automatic drift calculation (Δ) so you spot root-zone salt buildup or pH crashes before leaves show deficiency. Enter each bottle or salt's guaranteed analysis % and density once—every feed computes the exact milligrams and parts per million delivered.
Veg day, Flower day & EXIF Timelapses
Flip a plant to flowering with one toggle. PlantMaxer records the flip date, counts Veg days and Flower days separately, estimates harvest windows from strain flowering weeks, and plays back full-screen photo timelapses stamped with Day 49 · Flower day 21.
Veg d10
Veg d24
Flw d14
Flw d28
Veg Weeks 1–4 & Flower Weeks 1–8 Auto-Fill
Build custom nutrient schedules for soil, coco, or hydro. When you tap Log Today's Feed, PlantMaxer checks the plant's current veg or flower week and pre-fills every bottle's dose automatically—or tap Copy from Last Feed in one second.
Feed 12 plants once, log runoff individually
Assign hydro plants to a shared Reservoir or log a whole-room feed in your Flower Tent. PlantMaxer syncs the input feed (water, pH in, PPM in, nutrients) to every plant on that reservoir or room while keeping per-plant runoff pH/PPM readings independent.
Built for pollen chuckers, breeders & seed collectors.
Map multi-generation cannabis family trees, prevent pedigree loops automatically, and organize hundreds of seed packs and home crosses down to the exact box and grid slot.
Interactive Pedigree Trees & Offspring Tracking
Record Indica, Indica-dominant, Hybrid, Sativa-dominant, or Sativa cultivars along with breeder, flowering weeks, 1–5 star ratings, and filial generations (P1, F1–F6, S1, S2, BX1–BX3, IBL, Landrace, Clone-only). Pick Mother (♀) and Father (♂) strains from your library—and add parents recursively right inside the picker with automatic loop protection.
Know exactly what is in Box 1 · Slot A11
Track every seed lot by count, type (Regular, Feminized, Autoflower, Auto Fem), source, acquired date, and harvest date. Store lots in physical Seed Boxes with grid coordinates, export/import your entire vault via CSV Spreadsheets, generate a Spare Seeds List for trading, or roll the Random Strain Picker dice to choose your next run.
Live Govee VPD logging & true kWh electricity costs.
Pair Govee H5075 Bluetooth thermo-hygrometers to your rooms, compute leaf-offset VPD automatically, and track every watt across 18/6 veg and 12/12 flower photoperiod flips.
Live BLE Sensor Advertisements & History Sync
Assign one or multiple Govee Bluetooth sensors to a grow room. PlantMaxer averages live canopy temperature, RH%, and VPD across your room's sensors, monitors battery levels, logs readings automatically at 5, 15, 30, or 60-minute intervals, and charts a line per sensor.
Canopy Leaf Temp Offset & Light Checks
Log air temperature, relative humidity, IR gun leaf temperature, CO₂ (ppm), and canopy light intensity (PPFD µmol/m²/s). When leaf temperature is entered, PlantMaxer computes true Leaf VPD (kPa) using the Tetens vapor pressure equation instead of air VPD alone.
Flip from 18h to 12h without losing history
Log LEDs, inline fans, dehumidifiers, and AC units with wattage and hours/day. When you flip a tent from 18 hours to 12 hours, PlantMaxer keeps the historical schedule change so your kWh usage and electricity cost reports stay exact for Today, 7d, 30d, and All Time.
Test-drive PlantMaxer's VPD & Elemental engines.
These interactive calculators run the exact same Tetens vapor pressure and guaranteed-analysis elemental conversion formulas built into the iOS app.
🌡️ Canopy & Leaf VPD Calculator
🧪 Elemental NPK + Ca/Mg/Si Breakdown
Water Volume: 4.0 LPrint Brother DK labels. Scan any pot or seed vial.
Every plant, strain, seed lot, and storage box in PlantMaxer gets a unique Code 128 barcode (P7KQ2MX, S9M4K2P, L3X8N1Q). Print individual or batch labels straight from iOS in standard 17 × 54 mm (seed vials & plant stakes) or 62 × 100 mm (pots & full seed box manifests).
Tap the camera scan button on the Plants or Strains tab and point your iPhone at a label to jump straight to that plant's feed log or strain pedigree.
Blue Dream #1
Blue Dream F1 · Started Oct 14, 2026
Crown Royal × Haze Extreme
Regular seeds · F1 · Box 1 · A10
Vault Box 1 — Dank Bank
18 lots · 342 seeds · A1–F12 indexed
Your grow never touches our servers.
PlantMaxer has no accounts, no sign-ups, no analytics SDKs, and no third-party servers. Everything is stored locally on your iPhone and iPad using Apple SwiftData, optionally synced across your own devices through your encrypted private iCloud container, and exportable anytime as a full JSON backup or CSV seed inventory.
PlantMaxer for iOS
Requires iOS 17+ · Universal for iPhone & iPad · Native SwiftUI & SwiftData
Buy now on the App Store Read Our Zero-Tracking Privacy Policy