Grotek’s nutrients, a Greenstar Plant Products brand, has been providing growers with quality science and exceptional results for over 20 years. Our high-performance products have earned the trust of both hobby and commercial growers worldwide. Grotek has been an industry pioneer, combining key organic extracts with mineral fertilizers, giving growers the opportunity to vastly improving harvest quality.
A complete range of plant growth enhancers to run in conjunction with the growing base nutrient solution.
Grotek's Core is the heart of the Greenline Organics range and offers the essential NPK ratio that provides the basis for our mu...More
Calcium is vital to the success of the plant, and Grotek Vital provides growers with an opportunity to obtain the right level of calcium ...More
Growing indoors organically can pose problems not only because of the lack of biology, but also because of the lack of micronutrients. Mi...More
Kelp has long been considered an incredible organic supplement. Growth Max is a highly concentrated cold processed kelp rich in organic c...More
Biofuse™ is a water-soluble inoculant containing microorganisms that come to life when applied to soil. These beneficial microbes c...More
The variety of mycorrhizae found in Synergy ™ is particularly effective in intensive agriculture when fertilizers are used. Not all...More
Black Pearl was the first product in Grotek's Greenline products. Grotek was the first to bring engineered charcoal to our industry i...More
Redesigned from innovative research, KickStart is formulated for seedlings, cuttings and transplants. By increasing the efficiency and de...More
Grotek Pro-Silicate is designed to protect plants from stress such as heat, draught, cold, pests and disease. While not considered an ess...More
Groteks Vitamax™ Pro is based on a university developed proprietary kelp extraction process. It contains unparalleled energy f...More