Using Moldy Straw as Mulch or Compost: Safe Practices

Safety Assessment

Moldy straw from wet bales contains saprobic fungi (decomposers). They don't infect living plants. If no animals are present (spores can cause allergies), it's safe as mulch.

Precautions

Monitor plants for nitrogen deficiency (yellowing) as decomposition ties up N. Supplement with 10-10-10 if needed. Alternatively, compost the straw: layer with yard waste and soil; by fall it'll be rich compost.