Should Compost Be Mixed with Soil?

Some experts recommend that compost be spread over the soil and not mixed in. ... Over time, rain, worms and other natural actions will wash the compost into the plant's roots. If you are making your own potting soil, mix compost in 1 part compost with 1 part each peat, perlite, and top soil.

How much compost do I mix with soil?

Determine the appropriate compost application depth for your project. The general rule of thumb is 1/4 to 1/2 inch if applying to the top of the soil and 1 to 2 inches if you plan to amend the soil. Recommended maximums are 30% compost in a soil blend, but no more than 25% compost in containers or raised beds.

How do you add compost to soil?

Work 1–2 inches of compost into the top 3–5 inches of soil. Give your vegetable garden plenty of compost in the fall. Spread several inches of compost on top of the existing bed, then till it into the soil in the springtime. Put a handful of compost in each hole when you're planting.