Moreover, proper airflow also creates a balanced environment for optimum photosynthesis. Ventilation removes warm, humid air and replaces it with drier air to prevent condensation, the breeding place for disease and mold. It is essential to ventilate your grow, which will provide circulation, humidity and temperature control, and manage the CO 2/Oxygen replacement. Light dep occurs within a broader context of controlling environmental factors like temperature, humidity, irrigation, and CO2 levels. and with a lot of ventilation, not uncover the plants until 7:00 a.m., shortening the duration 3 to 4 weeks. If you’re in a hurry, you might cover at 6:00 p.m. and uncovering once it’s dark to let your plants awaken naturally when you do, so be it. cover window that produces nice sticky buds, you have to figure out what schedule works best in your locale’s light, temperature, and humidity conditions. While a lot of people rely on the default 6:00 p.m. to 8:00 p.m., you may want to use the morning hours to light-dep, so your plants don’t get cooked in the evening heat. Plants, especially once budded, need to be uncovered at night to ensure proper air circulation and temperature.ĭefenbaugh’s bottom line is to simplify: if the best light is from 6:00 a.m. James Defenbaugh, author of The Light Dep Growers Guide: How to Harvest Marijuana Multiple Times a Year, says that the “ideal time to cover is when the plants are getting shaded out.” But he goes on to say that growers must also consider location, orientation to the sun, and personal schedule and flexibility. This method is contingent upon good ventilation throughout the whole grow, especially during the bud cycle. and 7:00 p.m., setting a hypothetical greenhouse covering time at 7:00 p.m.

The old-school camp favors a sun exposure between 7:00 a.m. To be effective, growers maximize the sun but shoot for a consistent light-dep schedule of twelve consecutive hours of unobstructed darkness for sixty days. This will vary depending on the plant type and whether it’s an eight-week or ten-week strain. Whatever strain you decide to work with, make sure to note ideal sun exposure and daily darkness minimums. Figure out what it needs, how long it takes to flower, and how to reproduce those results.” James Defenbaugh advises “what you need to do is choose a strain, and master that strain. Some of the more delicate strains include OG Kush, Pure Kush, Bubba’s Gift, and Guido.Īs you work through a few harvests, you’ll develop experience that will allow you to tackle more sensitive strains. Vulnerable strains include those most susceptible to mites, mildew, mold, root rot, and fertilizer sensitivities.

By researching different strains, you gain critical information about sun exposure, when to plant and harvest, and vulnerabilities that could limit overall production.

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