use in the first 2 wks of bloom phase.good to use in all growing medium( rockwool, coir, soil, peat moss, ebb & flow, NFT, aeroponics, aquaponics, vertical stacker, rotary, indoor, outdoor, synthorganic , synthetic)contains specific plant nutrients and kelp to force indoor gardens to start flowering earlierBenfits are maxium yields/ maxium budding sitesoptimim floral developmentsave time and moneyoptimim floweringoptimim essential oilsmore crop cycles per year