For superior moisture-holding ability, choose Black Gold® Moisture Supreme Container Mix 0.10 – 0.06 – 0.13. This superior mix holds extra moisture on hot, dry summer days, and it feeds plants for up to 6 months! It is specially formulated for outdoor containers, hanging baskets, and window boxes. You’ll love its rich blend of Canadian Sphagnum Peat Moss, Compost, Sun-Coir, Earthworm Castings, RESiLIENCE®, and other key ingredients for great container gardening.