Beanstalk FORTIFY hemp fertilizer is best used for cultivars that are especially prone to calcium deficiencies. If you are flowering a calcium-hungry cultivar, or if you are growing in coco coir or peat moss, FORTIFY is the solution for you. Designed for a 100-day release rate, this single-application, calcium-fortifying solution is the plug-and-play product you've been searching for. Apply at a rate of 5 grams per gallon of media. For best results, use in conjunction with Beanstalk's Absolute Flower and K-BOOST hemp fertilizers.