New material added to a heap can double as moisture-retentive mulch. Here, wooden sides help reduce water loss by shading a working compost pile.
The microscopic workforce that transforms old plant parts into compost must have water to do its job, so compost often needs as much water as actively growing plants need. Locating compost close to a water supply makes replenishing moisture fast and convenient, or you can try snaking a soaker hose through an open heap as you build it.
Soaker hoses are the easiest way to make sure new compost piles comprised mostly of leaves and withered plants get enough water to support decomposition.
In summer, many composters cover open heaps with mulch, tarps, or old blankets to limit evaporation. Even when left uncovered, the interior of established compost piles tends to retain moisture well. Enclosures of any type, from wood pallets to concrete blocks, also help compost retain moisture.
