Hay vs. Straw in the Garden: Which is Better?
Search the internet for info on using hay vs. straw as mulch and you’ll see statements like these: “I’ve never made the mistake of using hay”, or “Straw makes great mulch — or, for that matter, a great addition to your compost pile; hay does not”, and “I inadvertently asked for hay instead of straw one year and that slip of the tongue turned into a nightmare.”
First, let me tell you the difference between straw and hay. Straw is the stalks or stems of grains like wheat, barley, or oats after the grain has been harvested. Hay is grass or legumes that have been cut and dried and is generally used as animal feed. Hay often contains seeds which sprout when used as mulch, which is why there are so many warnings against using it. Straw can also contain seeds if all of the grain was not removed, but in general it is less of a problem.
So, what do I do? I use hay! Here’s why: Hay is mineral rich; straw has little nutrition. My main concern as a gardener is to build my soil. As hay decomposes, it adds many more nutrients to the soil than straw. I also prefer to work with hay finding it much less stiff. I use it as mulch and as I build lasagna gardening beds. Alfalfa hay is particularly rich and I use it often.
So how do I get away with using hay, when there are so many warnings against it? What I do is try to anticipate how many bales I will need next year, and purchase them this year. I leave them out where they will receive rain and snow. Most of the seeds sprout, and the bales begin to decompose. By the time I use them as mulch, or to build a new bed, they already contain worms and other beneficial soil organisms. And weeds are a minor problem, if at all. If you have access to a farmer who has old bales around that he can no longer use to feed his animals, he may just give you the hay. It’s a treasure; take it!
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