GREEN PLANET - GP3 MICRO - 10LGP3 Micro is an essential component of our 3 part base nutrient system and provides your plants with the optimal array of macro and micronutrients they need during the vegetative & flowering stage. GP3 Micro is part of the GP3 Feed Program. GP3 Micro formula ensures optimal results during the vegetative and bloom stage. GP3 Micro is the component of the GP3 nutrient system that provides your plants with the essential and supplemental nutrients they