Can You Compost Hay that’s Past Its Prime?

Preparing Hay for Composting

When hay is past its prime, it’s often dry, moldy, or has been exposed to the elements. Before composting, it’s essential to check for any signs of spoilage or contamination. Sort through the hay and remove any moldy or rotten sections to prevent the spread of disease and attract pests. Shredding the hay before composting can help speed up the decomposition process.

Composting Hay

To compost hay, you’ll need a pile with a mix of “green” and “brown” materials. Green materials like food scraps, manure, or grass clippings add nitrogen, while brown materials like hay, straw, or wood chips provide carbon. Aim for a mix of 2/3 brown materials and 1/3 green materials. The ideal carbon-to-nitrogen ratio is between 20:1 and 30:1. For a 4’ x 4’ compost pile, use 2-3 cubic feet of brown materials and 1-2 cubic feet of green materials.

Managing Odors and Pests

Composting hay can produce odors and attract pests if not managed correctly. To minimize odors, turn the compost pile regularly to aerate it, and add a layer of brown materials to absorb excess moisture. To prevent pests, cover the compost pile with a tarp or wire mesh to keep out rodents and other critters. Monitor the compost pile’s temperature, aiming for a range of 130°F - 140°F (54°C - 60°C) to ensure that pathogens are killed and decomposition occurs efficiently. After 2-3 months, the compost should be ready to use as a nutrient-rich soil amendment for your garden or homestead.