Growth Technology Coco Bloom A&BDo your plants appear pale? It could indicate a nitrogen deficiency, which also implies insufficient chlorophyll production the plant's food factory. GT Optimum Bloom can help by increasing phosphorus and potassium levels, promoting optimal flower and fruit development. This hydroponic solution works well with various inert growing media such as rockwool, perlite, clay, and coco peat in both recirculating and run to waste systems.