How to Add a Mushroom Compost to Your Vegetable Garden


Mushroom compost is a good fertilizer for vegetable garden soil. Mushroom growers mix chicken manure, gypsum, straw, nitrate and other organic materials. The concentrated nutrients that remain after use in growing mushrooms are also high in salts, so you must mix it with planting soil before putting it in your vegetable bed.

Step 1

Buy mushroom compost from a garden center or nursery.

Step 2

Buy organic planting soil from a garden center or nursery. You can mix the compost with soil in your vegetable garden rather than purchasing new soil.

Step 3

Mix the soil and mushroom compost using 2 parts soil to 1 part mushroom compost.

Step 4

In the fall, put the organic soil and mushroom compost in your vegetable garden so it can age over the winter.

Tips and Warnings

  • Mushroom compost contains high salt content that can damage vegetable seeds and prevent them from growing. Be sure to mix the compost with planting soil.

Things You'll Need

  • Mushroom compost
  • Organic planting soil
  • Shovel


  • Fine Gardening Magazine Q&A: Mushroom Compost
  • Veggie Gardenng Tips: Mushroom Soil in Veggie Garden
  • Home Vegetable Garden: Vegetable Garden Fertilizer

Who Can Help

  • Oregon State University Extension: Mushroom Compost - Use Carefully
Keywords: mushroom compost, vegetable gardens, organic gardening, fertilizing vegetables

About this Author

Kathleen Sonntag lives in Carmel, California, where she is a writer, teacher and editor. She is a Master Gardener and writes articles for gardening publications. Sonntag has written and edited reading test passages and has edited children's books, cookbooks and memoirs. Her articles appear on Sonntag holds a Bachelor of Arts from University of California, Berkeley.