Woolly’s top plant food pick! Osmocote® Outdoor & Indoor Smart Release® Plant Food provides a four month controlled supply of essential nutrients for colorful blooms and lush foliage. This granular fertilizer is suitable for plants in enclosed spaces (pots, hanging baskets, window boxes and the like). Outdoor & Indoor Plant Food can also be used with bulbs and roses. Feed your plants the best vitamin packed fertilizer and watch them grow huge and happy!