Question: Can I use cedar shavings as mulch in my vegetable garden around squash or tomatoes specifically? Answer: Jonathan Foster, Home Horticulture Outreach Professional Cedar has at times been a controversial choice for mulch, due to concerns over 1) its naturally occurring biochemical properties having what’s known as allelopathic effects (that is, inhibiting the normal read more Can I use cedar shavings as mulch in my vegetable garden around squash or tomatoes specifically?