Proactive PKB 16/21 Nutrient Absorption Enhancer ✅ Low-noise operation

✅ Low-noise operation

and a healthy root system

Promotes Strong

Developed in 2014 and formerly known as Iceline

promoting larger

Proactive PKB 16/21 Nutrient Absorption Enhancer ✅ Low-noise operationProactive PKB Methodology N: 0. 0 P: 16. 0 K: 21. 0 B: 0. 5PKB 16 21 Professional PK Flowering Additive Proactive PKB 16 21 is a high performance professional flowering additive featuring a completely unique phosphorus to potassium ratio of 16 21, enhanced with added boron to maximize flowering performance and crop quality. Designed specifically for the bloom phase, PKB 16 21 enhances photosynthesis, supports efficient water regulation, and delivers