Hi-Cal special 15-0-15 is a plug growing formula with high nitrate nitrogen, calcium, magnesium and minor elements, all combined into a totally soluble mix . The trace elements are delicately balanced at levels that have proven to work well . This formula will work when phosphate is not a problem or being supplied separately.

Although designed for plug growing, this formula will work equally well on any crops that may be sensitive to ammoniacal nitrogen during low light periods .