K-Lite Plus (14-1-1-8Ca-3Mg) is a variant of the original K-Lite formula modified to contain more ammonium-based nitrogen, moving it from 98% nitrate/2% ammoniacal to 85%/15%.
While nitrates are generally the preferred nitrogen source for many plants, some prefer a bit more ammoniacal nitrogen.
Plus, as plants absorb nitrates, they secrete compensatory negative ions that, over time, causes the substrate pH to increase. The absorption of ammoniacal nitrogen has the opposite effect, and since orchids tend to prefer things more on the acid side, this reformulation helps ameliorate the increase.
In use, this formula will produce green solutions to differentiate it from the blue color of original K-Lite solutions.
One pound makes approximately 175 gallons of 100 ppm N solution.
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