This is a great time of year — when farmers are looking to get rid of old ones (something that happens in the spring as well) — to pick up one or two staw or hay bales. You might also be able to buy straw bales at your local nursery or gardening store but they’ll probably cost more. They make great seasonal decorations … put a trio of various shaped pumpkins on one (or a stack of two or three) in a strategic place visible to passersby, balance a sheaf of cornstalks against it if you have them and voila: Autumn’s great visual symbol of harvest. Then, when the season is over, you can break them up and use them in your garden and compost pile. Or can you?
The problem with straw mulch is that it often contains seeds. Gardening with hay bales, in our experience, is even worse; they contain more seed than a nursery in March (not everyone makes the distinction between “hay” and “straw” … see this article for the benefits of using hay). The best straw comes from wheat or oats, if you can get it. Most of the seed has been removed depending on how effective the farmer’s thresher is and how much weed has grown in his field. But I still wouldn’t put it in your compost heap unless it’s hot enough to destroy the seed. (more…)