How To Solve Nutrient Deficiencies In Marijuana Plants 

By Robert Bergman, ILoveGrowingMarijuana.com 1 – Alfalfa and Cottonseed Meal To correct nitrogen deficiencies in your marijuana garden, adding granulated products made from alfalfa and/or cottonseed to the soil provides protein which counteracts the deficiency. Pressed alfalfa hay and the remaining solids after cotton seeds have been pressed for oil…

Continue reading

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…

Continue reading