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Can I mulch my garden with sawdust only?

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

This entry was posted on Saturday, July 26th, 2008 at 10:39 am and is filed under Ask A Master Gardener. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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

  1. Karen Says:
    July 26th, 2008 at 10:48 am

    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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