Use your leaves as an airflow sensor — see where the air actually reaches.
Airflow Scan watches leaf motion through your camera and turns it into a relative airflow map across the canopy, with dead zones and over-blasted spots called out by name. GrowScope then cross-checks that real reading against its own modeled ventilation map for the box, and tells you when the two disagree.
The problem
A ventilation model built from fan specs and box geometry is still a model — real airflow bends around leaves, gets blocked by a neighboring plant, or funnels along a wall in ways a clean simulation doesn't fully capture. Without a way to check the model against reality, you're trusting a diagram over the plant that's actually sitting in the airflow.
Why it's hard to solve alone
A dead zone hiding behind a dense canopy is exactly the kind of spot where humidity pockets and mold risk build up unnoticed, while a fan blasting one side too hard stresses that plant without helping the rest of the box. Both are easy to miss by eye and easy to fix once you actually know where they are.
How GrowScope helps
Point your camera at the canopy and GrowScope tracks how much the leaves move, section by section, building a relative airflow map with dead zones and over-blasted areas flagged. Because this comes from watching real leaves rather than modeling airflow in the abstract, GrowScope compares it to its own physics-based ventilation model for the box and tells you specifically when the model says stagnant but the leaves are moving, or the model says a strong blast but the leaves are still.
How it works
- Point your camera at the canopy; GrowScope reads how much the leaves in each section actually move over a short capture.
- The result is a relative airflow map across the canopy, plus flags for dead zones and spots getting an excessive blast.
- Label a setup ('current position', '+20cm higher') so you can run an honest A/B comparison after moving a fan.
- GrowScope cross-checks a recent scan against its own modeled ventilation map for the box and flags the two disagreements that matter: modeled stagnant but leaves moving, or modeled strong but leaves still.
- Today suggests an Airflow Scan as an optional task for the first ten days after you flip to flower — the window when growers most often reposition fans for the denser canopy ahead.
What you get
You see where air actually reaches on the leaves themselves, catch a mismatch between the ventilation model and reality, and get an honest A/B comparison before and after moving a fan — instead of guessing from where the fan is pointed.
Frequently asked questions
Does Airflow Scan replace the 3D ventilation map?
No — it checks it. The ventilation map is a physics-based model of the box; Airflow Scan is what your actual leaves are doing right now. GrowScope compares the two and flags a real disagreement, it doesn't overwrite the model with the scan.
How do I compare fan positions before and after a change?
Label each scan with a setup name — 'current position', '+20cm higher' — and GrowScope keeps them as a comparable A/B pair on the same grid, rather than mixing readings from different fan setups together.
Is Airflow Scan a recurring task?
It's suggested — as an optional Today task, not a required one — only during the first ten days after you flip a plant to flower, the window when the canopy is about to get denser and fans often need repositioning.
What does 'dead zone' actually mean here?
A section of canopy where leaf motion during the scan stayed low enough to flag as effectively still air — worth a closer look, not a guaranteed mold risk on its own.