After 10 to 12 weeks you can start harvesting. This depends on the type and also on the circumstances of growing. You should try and bring in the harvest when the plant is on its peak. Then the yield is highest and the quality is best. When you notice a part of the pistils becoming brown and the small leafs are completely raised and full of resin glands, then it is time to harvest. Cut off the yield from the plants and leave the tops dry at a temperature between 10 and 18 degrees for minimally one week. After that it is best to keep the yield airtight.