Mammoth P is an organically derived microbial inoculant. It will maximise the phosphorus and micronutrient cycle to increase bud size, yield, and enhance plant health. Shelf life over 2 years pH operating range is 4 to 9 Temp range is from freezing to 40C (can be frozen and re-invigorated). Average yield increase is 16% (pier reviewed and sited studies available) OMRI certified and 100% organic Now sold in over 1500 stores world wide Won product of the year 2017 in Garden Culture UK magazine survey. Application rate is a tiny 0.16ml per litre (making it much cheaper to use than its price suggests). Average return on investment is over 400% - documented by over 100 x Colorado commercial grows. How shoud I Use Mammoth P Mammoth P is already active and concentrated, so it is best to apply right before application to the plants. The P microbes like to be in the root zone, so the faster that you deliver them to the plant is best. Remember, you only need to use 1ml per 8L of mixed up solution due to the high concentration! Tip: Use a pipette to deliver 1ml plus 6 more drops to a 10L bucket of water and nutrient solution.