This is a terrific fertilizer developed at Michigan State University specifically for orchids. This version is formulated especially for those using Rain water, Reverse Osmosis water, or similar purified, low nutrient water source.
The MSU fertilizers are formulated primarily with Nitrogen in Nitrate form for efficient plant utilization. (Ammoniacal Nitrogen is very difficult for orchids to assimilate). This fertilizer contains all the micronutrients and trace elements that orchids need.