Designed for the avid organic gardener. This permeable fertilizer pack can be left to steep in a watering can overnight to make a Compost Tea brew for topical application. Suståne 4-6-4 Compost Tea Bags: Provide single dose applications of Suståne organic slow release nitrogen fertilizer. Sustane compost tea is designed to provide organic plant nutrition in a completely biodegradable filter pack. The microbiology from aerobic compost tea provides numerous benefits to plants and soil. Beneficial micro-organisms compete for resources with the disease-causing bacteria (pathogens) resulting in less disease pressure and healthier plants. Bags come in 12ct, each bag makes one gallon of compost tea. OMRI Listed.