House & Garden A&B soil base nutrient is designed to be used only in soil and works best with House & Garden soil mixes. The unique composition of soil nutrients requires an extremely precise composition of the various minerals which ensures that soil and nutrients are used to their full advantage. House & Garden two part soil nutrients are soil specific nutrients. The special composition of the nutrient solution leaves the water reservoir pure and keeps it fresh. At the same time it provides an excellent balanced nutrient ensuring optimal absorption at the root zone.