How to Use Ash for Compost

Wood ash is a valuable addition to compost.
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Ash from your fireplace or outdoor fire pit can be a useful amendment to your garden. In its raw state, ash can discourage insects living in the compost pile from migrating to the rest of your garden. It can also add lime and potassium to the soil. When used in compost, ash adds valuable nutrients without changing the pH of the soil. The exact nutrients depend on the type of wood that is burned. Layering wood ash into the compost pile also helps control odors and neutralizes the pH of the compost. (See References 1)

Build Your Compost Pile

Step 1

Choose a location for your compost bin or pile. Ideally, this location should be shaded and near a water source. This will prevent the compost from drying out in hot weather. If you are building your compost pile directly on the ground, be sure you have a 3-foot by 3-foot space available.

Step 2

Layer 6 inches of brown, carbon-rich materials such as dry leaves or twigs in the compost bin or on the ground.

Step 3

Add a 3-inch layer of green, nitrogen-rich materials such as grass clippings or kitchen scraps.

Step 4

Sprinkle a thin layer of soil or finished compost over the pile.

Step 5

Add a thin layer of ash to the compost pile or bin.

Step 6

Repeat these layers until you run out of compost materials.

Step 7

Use the hose to spray down the entire compost pile. Do not saturate the pile. It should be about as moist as a damp sponge.

Maintain Your Compost Pile

Step 1

Use a shovel or pitchfork to turn the compost weekly. Move materials from the outside of the pile toward the center, and materials from the center toward the edges.

Step 2

Spray down the compost pile with water if it is too dry.

Step 3

Cover the bin or pile with a tarp -- and secure the edges with rocks to prevent heat and moisture loss -- in the event it dries out quickly.

Step 4

Continue to add compost materials and ash to the pile as you accumulate them. Turn the pile thoroughly after you add new materials to ensure they are well-mixed.

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