Purple Non-Sulfur Bacteria

Purple Non-Sulfur Bacteria (PNSB) are photosynthetic, beneficial bacteria that support soil biology, nutrient efficiency, and plant resilience. Unlike common microbes, PNSB can function in both aerobic and anaerobic environments and thrive in the presence of light, making them uniquely versatile in living soil systems.

PNSB help recycle nutrients already present in the soil, converting unavailable forms of nitrogen, phosphorus, and carbon into plant-accessible compounds. They also interact synergistically with mycorrhizal fungi and other soil microbes, strengthening the soil food web rather than competing with it.

In addition to nutrient cycling, PNSB are known to support plant stress tolerance by producing bioactive compounds that improve root signaling, metabolic efficiency, and overall plant vigor—especially under heat, drought, or low-oxygen conditions.

Widely used in natural farming, EM systems, bokashi, and regenerative agriculture, Purple Non-Sulfur Bacteria are a powerful biological tool for growers focused on soil function over force-feeding.

Best used for:

• Living soil and no-till systems

• Compost, bokashi, and microbial inoculation

• Root health and nutrient efficiency

• Stress mitigation and overall plant vigor

Contains: Live, photosynthetic Purple Non-Sulfur Bacteria culture

How to Use

• Soil drench: Dilute 1–2 teaspoons per gallon of non-chlorinated water. Apply to soil or root zone.

• Foliar spray: Dilute ½–1 teaspoon per gallon. Apply during low-light hours.

• Compost & bokashi: Add directly or dilute and spray to inoculate organic matter.

• Microbial blends: Compatible with EM, LAB, bokashi, compost teas, and biological inputs.

Application frequency: Every 1–2 weeks or as needed to support soil biology.

Storage: Store out of direct sunlight. Do not freeze. Use promptly for best results.