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Underwriter Labs (UL) listed in United States and Canada
a potent rooting hormone
Simple math
long battery life
Grotek™ Core™ Size:4L Underwriter Labs (UL) listed inAt the heart of Grotek's line is the essential NPK that provides the foundation for their multi product formula. Core is based on plant matter, which provides key minerals but also high levels of humates and other plant and mineral derived metabolites. This formula can also be used to feed and stimulate soil biology, increasing production of substances known to accelerate plant growth. Just like the rest of the Grotek liquid organic range, Core is
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