Yesterday, 02:16 AM
An unheated greenhouse or polytunnel lets autos go out a month earlier than open ground, and the extra warmth alone can cut a week off finish time. Humidity builds up fast in a closed tunnel though, so ventilation in the last three weeks is what keeps the dense buds from rotting. Layouts and spacing for tunnel grows are covered on https://turboautoflowerseeds.com, along with which strains handled the temperature swings without stalling. Three harvests a season is realistic under plastic at mid latitudes.