100% natural fertilizer, derived from dried poultry waste. Nutri-Rich 4-3-2 w/ 7% calcium is formulated into easy-to-apply, uniform pellets and granules and works with any application equipment. Nutri-Rich provides an optimum balance of nutrients to promote longer lasting green, strong and robust root and shoot growth, and quality flowering and fruiting. The broad spectrum of nutrients release slowly, giving plants the nutrition they need, when they need it.