Gold Label Ultra MG is a nitrogen rich source of magnesium additive for all plant development stages. Ultra MG has been specifically developed to perfectly balance your NPK and micro nutrients in all stages of vegetative and generative development. It contains high quality magnesium chelate which is easily absorbed by your crop in a wide pH range. Use continuously on inert media and as a replenishment on soil and soilless media. Use in combination with Gold Label Base Nutrients.