How and when to water

Most watering problems come down to too much, too little or the wrong timing. These guides help you read soil moisture, check runoff, bottom water and flush, and catch overwatering or underwatering early. Outdoor growers will find drip lines, soaker hoses, ollas, sprinklers, hose timers, drought tips and how to winterize irrigation. Where your water comes from is covered in [Water quality](/soil-and-watering/water-quality/).

Rows of potted cannabis plants on greenhouse benches with drip lines running to each container

Watering Cannabis in a Greenhouse

Learn when and how to water cannabis in a greenhouse: judging pots by weight, gentle hand watering, drip lines, water quality and temperature.

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