Mushroom Compost Humus is a nutrient-rich organic soil amendment made from composted materials left after mushroom production, including straw, manure, and organic matter. It has a neutral pH of approximately 6.0–7.0 (±0.5), making it suitable for a wide range of plants.

Lab testing rates this product very good to excellent in NPK (ppm levels), and its high organic content allows it to absorb and retain water at up to 80% of its weight, compared to roughly 15% for clay soils. This makes it an excellent choice for improving soil health and moisture retention.

Product Details

• Organic mushroom compost humus

• Neutral pH (approx. 6.0–7.0)

• High nutrient value (NPK ppm rated very good to excellent)

• Excellent water-holding capacity

• Dark, fine-textured material

• Best used blended with existing soil

Typical Uses

• Amending vegetable gardens

• Improving flowerbeds and ornamental shrubbery beds

• Preparing planting holes for trees and shrubs

• Topdressing lawns before seeding or sodding

• Enhancing moisture retention in poor or compacted soils

Coverage

• 162 sq ft per cubic yard at 2" depth

• 108 sq ft per cubic yard at 3" depth

Important Notes

• This product is not typically used alone; mix into native soil for best results

• Recommended application: 1–2 inches tilled into existing soil

• Generally mellow and plant-safe, but avoid excessive use in one application

• Ideal for improving soil structure, nutrients, and water retention

• Sold in bulk by the cubic yard