Category: Growing Fundamentals
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- Cultivation Software (16)
- Growing Fundamentals (26)
- Market Analysis (6)
- Cost Per Pound (9)
- Yield Optimization (5)
- AI Cultivation (29)
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BioTrack vs METRC: What Cultivators Actually Deal With
A practical, state-aware comparison of BioTrack and METRC government traceability systems, from plant tags and reporting to migration and reconciliation.
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Which States Use METRC in 2026? A Verified List
A dated operator reference to the 28 named jurisdictions in METRC’s accessible official material, including scope notes, transition watchpoints, and regulator links.
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Athena vs Pulse vs AROYA VPD Charts: Why They Disagree
Athena, Pulse, and AROYA can show different VPD numbers without any one chart being wrong. The difference is the measurement convention: air VPD, leaf VPD, or an assumed leaf-temperature offset.
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Clone and Seedling Environment: Temperature, Humidity, and VPD From Cut to Veg
A stage-by-stage operating guide for commercial propagation rooms, from fresh cuts through rooted clones and the handoff to veg.
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VPD With CO2 and LED Lights: Why Standard Charts Miss
CO2 and LEDs can change how a crop behaves at the same air VPD. Measure leaf temperature before shifting your room targets.
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VPD in Veg: Targets and Chart
Veg VPD targets grower-to-grower: run 0.8-1.1 kPa for fast growth, gentler for clones, and step up as you near the flip.
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VPD in Flower: Week-by-Week Targets
VPD targets for every week of flower. Stretch, bulk, and late-flower dryback ranges to push transpiration and cut mold risk, grower to grower.
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How to Read a VPD Chart (and What kPa Actually Means)
A grower-to-grower walkthrough of how to read a VPD chart, what the two axes mean, and what kPa actually tells you at the canopy.
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Leaf VPD vs Air VPD: Why Your Sensor Readings Lie
If you have been dialing VPD for a while, you already know the drill. You mount a sensor at canopy height, you read the number, you nudge temperature and humidity until you land in the range a chart told you to hit. Here is the problem. That sensor is reading the air. Your plants do…
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Printable VPD Chart: Air and Leaf VPD (Free PDF)
Every grow room I have ever run had a chart taped to the wall next to the door. Not because I could not pull the number up on my phone, but because a chart on the wall gets looked at. A number in an app gets ignored until something goes wrong. This is that chart,…