GREEN PLANET - GP3 BLOOM - 23LGP3 Bloom is an essential component of 3 part base nutrient system and provides your plants with the optimal array of nutrients they need for the bloom stage. GP3 Bloom is part of the GP3 Feed Program. Part of the GP3 base nutrient system, Bloom formula guarantees heavier fruit development during the flowering stage. GP3 Bloom is the component of the GP3 nutrient system that provides your plants with the right nutrients they need in the flowering