Bat guano is rich in nitrogen, phosphorus, and potassium. The high levels of phosphorus make it an ideal fertilizer for the flowering stage of cannabis plants. Flowering cannabis plants require an abundance of phosphorus, and a lower balance of nitrogen for highest possible yields and to ward of mold and disease.
Alternative To Bat Guano For Flowering Stage?
The best alternative to bat guano for top dressing organic grow cannabis plants during the flowering stage are worm castings. Feeding your plants with substitute worm casting tea or top dressing will provide ample amounts of different nutrients. A comparable dry amendment value of Nitrogen: 1.8–2%, Phosphorus: 1.3–1.9%, Potassium: 1.3–1.5%, Calcium: 3.0–4.5%.