The Stichting Institute of medical Marijuana (SIMM), the first company to sell marijuana through the pharmicies of Holland, has been investigating the medical possibilities of cannabis, together with TNO laboritories and the University of Leiden.
One of their discoveries has been that to keep the ripe plants in the dark before harvesting could increase their potency.
SIMM's growers seperated a crop of mature plants, harvested half of them
and kept the other half in absolute darkness for 72 hours before cutting and drying.
Analysis of the resulting dried buds showed that some varieties had seen increases of THC of up to 30 %, while the CBD and CBN remained the same.