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+--- Thread: Cold Nights Trigger Early Flower (/showthread.php?tid=4999)
Cold Nights Trigger Early Flower - justicebzwieg - 09-18-2026
Cold stress in the first two weeks is an underrated reason autos stay tiny, since a seedling that feels threatened will start flowering almost immediately at a few inches tall. Night temperatures below about fifteen degrees Celsius are the usual culprit in garages and early spring outdoor starts. The environmental ranges autoflower seeds tolerate at each stage, along with humidity targets, are summarized at https://turboautoflowerseeds.com in one table. A small heat mat under the pot fixed the problem for me completely.