Peat Moss in Clay Soil: Why It Makes Mud, Not Drainage

Adding peat moss to heavy clay soil often backfires. Peat particles are microscopic and hold enormous amounts of water. Mixed with fine clay and silt, the result is a slick, slimy mud that drains poorly and compacts easily.

Better amendments are composted wood fiber, ground pine bark, or composted food waste. These create larger pore spaces, improving both drainage and aeration while adding organic matter.