GroStar GS1 pH Pen double-ended This is a workhorse designed

This is a workhorse designed for growers who can't afford downtime

Add 2-5 mL of Grow A per gallon of water during the vegetative growth phase

Soul Grow-N nitrogen supplement was specifically crafted for the gardener who demands faster growth from high-performance fertilizers

Mercenary is an all-natural insecticide derived from essential oils that prevents and controls eggs

GroStar GS1 pH Pen double-ended This is a workhorse designedIncludes: pH 7 & pH4 calibration solution (50ml bottle each), KCL storage solution (10ml bottle), lanyard and user manual Measures pH and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Easy to use design and fast calibration adjustment Double junction replaceable probe, so you dont have to discard the entire pen when the probe reaches its end of life Large 3 color backlit screen gives