Lesson 4 — Mist, filtration, and controls

Goal: Build a mist system that keeps cuttings turgid without saturating media.

System components (commercial minimum)

• Water source + shutoff
• Filter (protects nozzles) + spare screens
• Pressure regulation (if needed for your nozzles)
• Solenoid valve
• Controller (timer or leaf-sensor)
• Nozzles/foggers + tubing + fittings

Control options

• Timer-only: cheapest, works, but easier to over/under-mist.
• Electronic leaf: adjusts with evaporation; more consistent day-to-day.

Example links

• Phytotronics — Electronic Leaf
• Netafim — CoolNet
• CoolNet Pro listing with specs

Build/Do

1. Draw your plumbing in one line (source → filter → valve → controller → nozzle line).
2. Plan zones: at least “fresh stick” separate from “wean” later.
3. Run a uniformity test: place cups across bench, run mist 1 minute, compare volumes.