Expert Gardener's Expanding Soil is a convenient, compressed 100% Coconut Coir soil and CocoPeat soil amendment that expands to roughly 7 times its packaged size simply by adding water. The Expanding Soil holds water and nutrients, making moisture available for the roots to use as they begin to dry out, which also reduces how often you need water. The soil block is easy to handle unlike a traditional bag and does not dirty your hands. This block expands up to 2.25 Cubic Feet and lasts up to 2 years before breaking down and feeding your soil. The Expanding Soil is pH neutral and totally safe to grow in, which makes it the perfect option for vegetables and herbs, especially when combined with soil or fertilizers. In addition it is a premium grade washed coir that is sterile and works as a hydroponic growing medium for all kinds of plants and vegetables.