The compost starter products are fine and may help. However if you build a pile with a good mix of green and brown stuff and keep it moist then things will progress well even without a starter product. Some gardeners add a shovel of rich garden soil or compost to help act as a starter by introducing microbes into the pile. You might want to try that instead of buying a starter product. If your pile lacks green stuff then sprinkle a little high nitrogen fertilizer into the pile and water it in well.
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