Quick Answer GreenPlanet Massive Bloom is a concentrated flowering additive for hydroponic, drain-to-waste, recirculating, coco, soil and soilless growing. It combines L-form amino acids, vitamins, carbohydrates, chelated minerals, phosphorus and potassium. Use at 5 mL per litre throughout flowering, while monitoring EC/PPM and adjusting pH as needed. Product Description Massive Bloom is formulated for the flowering stage and can be added to an established nutrient program. Its amino-acid, vitamin, carbohydrate and mineral profile is designed to complement flowering nutrition across common hydroponic and substrate systems. The official 5 mL/L rate can increase reservoir strength by approximately 300–400 ppm, so base-nutrient strength should be managed accordingly unless you are following a GreenPlanet feed chart that already accounts for Massive Bloom. Key Features Flowering-stage additive with phosphorus and potassium. Contains L-form amino acids, vitamins and a carbohydrate blend. Includes a chelated mineral profile. Suitable for hydroponic, drain-to-waste, recirculating, coco, soil and soilless systems. Official application rate: 5 mL/L throughout flowering. Available Sizes and Variants 1L 5L 20L Specifications Product type Liquid flowering additive Application rate 5 mL/L (19 mL/US gal) Application timing Throughout the flowering cycle Appearance Amber to light-brown liquid Odour Vanilla/molasses pH 4.5 Relative density 1.09 g/mL Solubility Completely soluble in water Package Contents One sealed bottle or container of GreenPlanet Massive Bloom in the selected 1L, 5L or 20L size. Directions for Use Fill the reservoir with water and begin your normal nutrient program. Account for Massive Bloom's approximate 300–400 ppm contribution at the official rate. If you are not following a GreenPlanet feed chart, reduce base-nutrient strength as required to stay within your target EC/PPM. Add Massive Bloom at 5 mL/L and mix thoroughly. Check EC/PPM and adjust pH as needed. Use throughout the flowering cycle. Care, Storage and Safety Keep the container tightly closed in a cool, dry, well-ventilated place between 0–35°C. Protect from direct sunlight, heat and ignition sources. Wear suitable gloves and eye protection; wash hands after handling. May cause mild skin irritation and eye irritation. If in eyes, rinse cautiously with water and seek medical advice if irritation persists. Keep out of reach of children. Do not ingest. Buyer FAQs What is GreenPlanet Massive Bloom? It is a concentrated liquid additive for the flowering stage. What rate should I use? The official rate is 5 mL per litre, equivalent to 19 mL per US gallon. When should I use it? Use it throughout the flowering cycle. Which growing systems are compatible? It is suitable for hydroponic, drain-to-waste, recirculating, coco, soil and soilless systems. Does it replace base nutrients? No. It is an additive intended to complement a complete nutrient program. Will it affect EC or PPM? Yes. At 5 mL/L, the manufacturer states that it adds approximately 300–400 ppm, so monitor solution strength. Should I reduce my base nutrients? Reduce them as needed to remain within your target EC/PPM, unless you follow a GreenPlanet feed chart that already accounts for Massive Bloom. Should I adjust pH? Check the final nutrient solution and adjust pH as needed after mixing. What sizes are available here? TG Hydroponics offers 1L, 5L and 20L variants on this listing. How should I store it? Keep it tightly closed, ventilated, protected from sunlight and stored between 0–35°C.