White powder on the leaves arrives in the last three weeks of an auto, when the canopy is dense, humidity climbs, and airflow through the middle has stopped. Removing the worst leaves and running a fan through the plant helps, but on a short timeline the practical move is to harvest a few days early rather than fight it. Which strains are prone to it and which shrug it off are logged on
https://turboautoflowerseeds.com from outdoor and greenhouse reports. Spacing plants further apart than feels necessary prevents most of it.
