Jacks Prof Dark Weather 15-0-15 25Lb — Single Unit

Jack's Professional® 15-0-15 Dark Weather Fertilizer is a high-nitrate, non-phosphorus formula developed to increase calcium availability during cool, low-light growing conditions. Frequently used as a finishing fertilizer for flowering crops such as poinsettias or alternated with 20-10-20 Peat-Lite, it provides balanced micronutrients to support healthy growth, strong stems, and consistent greenhouse crop performance.