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Can I mulch my garden with sawdust only?

Can I use sawdust as my primary garden mulch if it is kiln dried, without changing my pH levels?

One Response to “Can I mulch my garden with sawdust only?”

  1. Karen says:

    Before adding any amendment to your soil it is best to have a good idea of what the pH is for your area. Wood ash by nature is high in salt and pH (alkaline) and adding it without adding other amendments can disturb the soil balance. A better solution than applying it directly to your garden might be to add a small amount of garden fertilizer high in nitrogen to the sawdust and let it compost before applying it. Remember, if you have any walnut in your sawdust: it contains a toxin that can kill tomato and other plants.

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