Think of this like adding little 5-Star hotels throughout the root ball for the beneficial microbes in your potting mix, kind of like a spa day. The Sol Biotics lines are designed to give you options of a limited set of complimentary items to use all year round on all your plants without the worry of misusing them by accident and burning or hurting your plants. Designed to add life to old, tired soil or improve the performance of new soil. Soil Salvation uses worm castings and biochar to improve the effectiveness of beneficial microbes and fertilizers, keeping your plants happy for the long term! | Sol Soils Soil Salvation Soil Amendment | Size 4 oz