All-Purpose Feeder Paks are 10 gram polymer coated controlled-released packets providing nutritious 12-10-10 plant food that will supply nutrients for up to 24 months. They are environmentally safe and are the most efficient means of providing a supplemental source of nutrients to new transplants, indoor potted plants, and other ornamentals. Feeder Paks are highly-recommended for all your vegetable and home gardening needs where an effective plant food is desired.