You went to bed with a perfect tray

A 2-week cycle has no margin

Microgreens flip from seed to harvest in days. A bad night during blackout or the fluff stage drops a tray's yield for good — and you can't replant fast enough to make the delivery.

The top shelf is not the bottom shelf

A four-shelf rack can run a different cultivar at a different stage on every level. One sensor at the room level misses what each tray, on each shelf, actually sees.

Too wet molds, too dry burns

“How much water is too much, and when is it not enough?” Aim a fan to fight the mold and you windburn the tray; back it off and it damps off. LoopString watches the humidity swing so you catch the drift before the tray does.

Chefs want uniform trays

Restaurant and grocery buyers want consistency, and some want records. LoopString keeps a timestamped log per cultivar batch, so “every tray the same” has proof behind it.

Blackout to harvest day, hands-off

Recipes flip the rack from germination (dark, high RH) to fluffing to harvest day on their own clock. Nothing to reset on a wall timer when you switch cultivars.

Every rack on one screen

Track each rack — and each shelf where you put a sensor — in one view. Sparkline trends per cultivar lot, with the light and misting schedule overlaid so you can see when it actually fired.

A flag before the tray is gone

Alerts on the windows that lose trays: a humidity spike overnight, a misting pump that stopped, a blackout-stage drift. You hear about it while the loss is still one tray.

Per-batch records buyers ask for

A per-lot log of the conditions each cultivar batch grew in, exported as a PDF for the restaurant and grocery buyers who ask for it.