Humboldt Nutrients VerdeKeep Your Crops Brimming With Green Colors While Encouraging Lush Vigorous Growth Verde is a premium growth supplement with 16% nitrogen, 1% phosphorus, and 2% potassium, as well as calcium, iron, magnesium and other vital elements. This is a great blend for plants experiencing periods of accelerated growth. Verde contains every element necessary for a true growth supplement, increasing the rate of chemical reactions which facilitate plant growth.