THC Bloom A+B | High-Concentrate Flowering Nutrient for Australian Hydroponic Growers

Flowering is the most nutritionally demanding phase of a plant's lifecycle. The shift from vegetative growth to active flower development requires elevated phosphorus and potassium, sustained calcium availability, and a trace element profile that supports plant metabolism through weeks of high-output flower production. THC Bloom A+B delivers exactly this, in the same pharmaceutical-grade, ultra-concentrated format that makes the Total Horticultural Concentrate system one of the most efficient nutrient programs available to Australian growers.

Formulated specifically for Australian water conditions, THC Bloom runs clean in all irrigation systems and maintains stable performance across the diverse tap water quality found in Melbourne, Sydney, Adelaide, and regional growing areas.

What THC Bloom Delivers

The elevated phosphorus and potassium ratios in THC Bloom drive flower initiation, bud density, and final harvest weight from the first week of flower through to final ripening. The advanced chelation technology that defines the THC system keeps micronutrients available at a wider pH range than conventional bloom nutrients, which is particularly important during mid to late flower when deficiency pressure is highest and plant metabolism is running at its peak.

Pharmaceutical-grade purity means the formula is free from chlorides, sodium, and urea. This produces cleaner reservoirs, less salt accumulation in recirculating systems, and the clean mineral profile that supports terpene production and improved crop quality at harvest. THC Bloom is compatible with DWC, NFT, flood and drain, drip systems, coco coir, soil, and all standard indoor growing setups.

How to Use THC Bloom

Always add Part A to your reservoir water first and mix thoroughly before adding Part B. Start THC Bloom at 2ml per litre at the beginning of the flowering phase and increase progressively to 3 to 4ml per litre through mid-flower. Reduce EC in the final one to two weeks before harvest. Target pH range is 5.5 to 6.5 for optimal nutrient uptake.

For precise EC management through flower, the Bluelab Combo Meter measures pH, EC, and temperature in one reading. Many growers finish with a pre-harvest flush using TA FlashClean to clear residual salts and improve final harvest quality.

Frequently Bought Together

THC Grow A+B — the vegetative counterpart for the full two-stage program
THC Grow and Bloom Complete Set — buy both stages together at a better per-litre rate