Passive CO2 Control

Passive CO₂ Control provides a simple, low-cost way to increase carbon dioxide levels in your grow space — helping plants photosynthesise more efficiently and produce stronger, faster growth. By maintaining consistent background CO₂ enrichment, these products can noticeably enhance yield quality without the need for complex tanks or regulators.

Ideal for small to medium grow tents or rooms, passive CO₂ bags and emitters slowly release CO₂ over several weeks, creating a more productive environment with minimal effort. They’re perfect for growers who want to experience the benefits of CO₂ supplementation without investing in active systems. Common options include mushroom-based CO₂ bags, granule-based generators, and other self-regulating formulas that maintain safe, steady CO₂ levels.

At Greens Horticulture, we stock a reliable selection of Passive CO₂ Control products from trusted brands — designed to improve plant growth naturally, reduce stress, and promote more vigorous flowering and fruiting. Whether you’re running a small home grow or maintaining a compact setup, these passive CO₂ systems offer dependable, maintenance-free results — all with fast UK delivery and expert support.