Ganja Growers Go Green

An industry long haunted by negative connotations and a lack of sound research finds new opportunities in sustainability. VIEW IMAGES Marijuana plants are harvested for sale in states that have legalized medicinal and/or recreational use. PHOTOGRAPH BY LYNN JOHNSON, NATIONAL GEOGRAPHIC CREATIVE By Austa Somvichian-Clausen In the U.S., one square foot …

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Huge Cannabis Greenhouse Tantalus Labs, Hailed ‘Tesla of cannabis’ 

Melia Robinson A marijuana cultivator that’s been called the “Tesla of cannabis” is bringing the industry out of the darkness and into the light — literally. Tantalus Labs, which could start selling product as early as 2018, has wrapped construction on a state-of-the-art cultivation site designed to give marijuana plants …

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Maximize Cannabis Growth @ 700, 1,500 or 2,000 µmol/m2/s? And, What About CO2?

Words and images by Richard Jones. How ‘high’ must Photosynthetic Photon Flux Density (PPFD, µmol/m2/s) be to induce peak photosynthesis in Cannabis? In 2008, Chandra measured a maximum rate of photosynthesis at 1,500 µmol/m2/s. In 2015, Chandra conducted a similar assessment and measured a maximum rate of photosynthesis at 2,000 …

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