Environment & Crop Steering

Steering is deliberately pushing the plant vegetative or generative using climate plus three root-zone numbers — not a calendar.

Stage-by-stage targets for VPD, temp, RH, PPFD, DLI and CO2 — the climate half of steering.

Feed and root-zone EC by stage for coco vs rockwool, the pH bands, and the brand-agnostic base + supplement framework.

The three numbers a substrate sensor streams — what each means, what raises or lowers it, and how each steers.

How to measure field capacity, the P3 target math, and the veg vs generative dryback bands for coco and rockwool.

Every steering lever at once — water content, EC, dryback, shot size, frequency, runoff, VPD, temp, light — set for each direction.

The daily irrigation clock — activation, ramp-up, maintenance, overnight dryback — with veg and generative recipe values.

Probe placement, reading the daily VWC curve, and the standing daily and weekly room-check procedures.

Slope, inflection and the EC mirror-image of the VWC curve — how to read dryback rate as a live transpiration signal and diagnose channeling, root failure and salt spikes before any leaf shows it.

Why the transpired water and the light wattage set your latent and sensible loads — sizing dehumidification in pints/day and cooling in tons from first principles, with the night-VPD trap that low-RH rooms fall into.

The light-temp-CO2 triangle, the ~1,200 ppm sweet spot, lights-on-only injection, sealed-vs-vented logic, and why enrichment is wasted below ~800–900 PPFD.

Representative placement across zones, why one probe can't govern a room, cross-checking against handhelds, and a standing data-integrity audit that catches the sensor lying before you steer on a lie.