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There are few garden subjects I am more passionate about than mulch. It prevents weeds and regulates moisture in the soil, among its other benefits.

But which mulch should you use? Perhaps the most common is shredded leaves, but what if you're like me and you don't have access to deciduous trees? Then what are your options?

I've used wood chip mulch, hay mulch, straw mulch, and pine needle mulch, and I talk about the pros and cons of each type of mulch here. Although I prefer wood chip mulch, I have used hay mulch from time to time with good results.

But after talking to Jill Winger of the Prairie Homestead, I realized using hay as mulch isn't without its risks. In this episode of the Beginner's Garden Podcast, Jill talks about how deep mulching with hay poisoned her garden. Click below to hear our conversation or read on to find out what happened, how she identified the problem, and what advice she gives to other gardeners considering using hay to mulch their gardens.