This top-ranked 3-part hydroponics sample starter kit features our Grow, Micro,bloom Professional Base Nutrient Series. Emerald Harvest has won the `Best Nutrient Company? award 5 straight times. Why choose the 3 Part GMB Kick Starter Kit? Our 3-Part Kick Starter Kit gets you off to head start by pairing our flexible 3-part base nutrients with our award-winning supplements, including abloom booster, plant tonic, aroma, resin enricher and massive root builder.