Dutch Pro Original Grow Soil A&B is a 2-part nutrient especially for use in the vegetative cycle. The Hard Water version has been optimised for use in hard water areas. Dutch Pro Original Grow Soil is formulated to work perfectly with plants grown in soil. Dutch Pro Original Grow Soil contains a sophisticated blend of ingredients to provide all the basic macro and micro nutrients that plants need for strong, healthy growth. Dutch Pro particularly recommend the use of their Multi Total, Take Root and Keep It Clean with this nutrient. Dutch Pro also produce their own pH down for Grow product, based on nitric acid rather than the usual phosphoric acid. This is because nitric acid works better in the growth stages.