Cultured Solutions Bloom A (3.7-0-3): Calcium-Nitrogen Part A for Hydroponic Flower
Cultured Solutions Bloom A carries 3.7% nitrogen, 0% phosphate, and 3% soluble potash with calcium as the key cation. Lower nitrogen than the Veg A formula — that's the deliberate shift away from leaf production toward flower fill. But the N isn't zeroed out, because mature plants still need amino acid building blocks and chlorophyll maintenance right through flower. The calcium handles active transport of nutrients across root membranes and cell wall development in the new flower tissue. Keeping calcium and phosphorus split across the A and B bottles is why Cultured Solutions stays clear in the concentrate and stays stable in the reservoir, instead of settling out as a calcium phosphate precipitate.
Completes the Bloom Base When Paired 1:1 with Bloom B
Bloom A pairs 1:1 with Cultured Solutions Bloom B (1.3-4-6) to round out the phosphorus and potassium side of the flower program. The Bloom line shares the same clean hydroponic chemistry as the Veg line, so you can switch from veg to bloom without flushing or re-calibrating the system. Sizes run parallel to the rest of the Cultured Solutions lineup: 1 gallon for a home tent, 5 gallon for a hobby room, 15 gallon for production, and 55 gallon for commercial flower rooms where Bloom A consumption tracks the pace of a multi-light flower cycle.
Key Features
- NPK 3.7-0-3 with Calcium: Moderate nitrogen plus potassium and calcium keeps mature plants healthy without pushing new leaf growth during flower.
- A/B Prevents Ca-P Precipitation: Separating calcium from phosphorus across the two bottles keeps the concentrate clear and the reservoir stable.
- Clean in Shared Reservoirs: Built for UC DWC and recirculating systems where nutrient stability matters across multi-week bloom cycles.
- Pairs 1:1 with Bloom B: Equal-parts mixing with Cultured Solutions Bloom B (1.3-4-6) completes the hydroponic two-part bloom base.
- Matches Veg Line Transitions: Same clean chemistry as Cultured Solutions Veg, so swapping from veg to bloom doesn't require a flush or re-calibration.