Three part base nutrients cover the complete gauntlet of growing, from seed all the way to harvest. Generally, you'll see a grow, a base, and a bloom as part of the configuration. The grow, or veg, will be a nitrogen heavy nutrient for the vegetative phase of plant growth. The base,or micro, contains most of your micronutrients, like zinc, manganese, sulfur, and calcium, as well as a small amount of NPK, this will support some of the more minor, but still necessary, funcitons of plant growth and development. Lastly, you'll have your bloom or flower. This nutrient will be high in phosphorus and potassium, and supports the flowering stage of a plant's development. Put together, 3 part base nutrients feed your plant over their entire life cycles. Browse now across our many 3-part nutrients.