It’s this year’s hottest way (heh) to garden! And it’s also a social media phenomenon! It’s straw bale gardening. Ever since the publication of his book, Straw Bale Gardens (Cool Springs Press), Joel Karsten has become something of a gardening celebrity, making television and YouTube appearances, being interviewed by major papers, and gathering a Facebook following that counts over 27,000 likes.
We’ve written about using straw as mulch and bale gardening whether straw or hay, before. Karsten has really refined the technique which basically revolves around one thing: the bales are composting as the plants grow. The heat generated by the composting straw gives the vegetables planted in them a distinct advantage. Warmer “ground” temperatures stimulate root growth. Karsten capitalizes on this by pulling plastic tents hung from wires strung over his bale rows to trap that generated heat, thus giving him an early start and warm early conditions there in his Roseville, MN home.
Once you line up rows of bales for your garden, how do you get them to start composting as they stand there above ground exposed to the elements? Karsten “conditions” the bale for up to two weeks ahead of planting by sprinkling traditional chemical fertilizer that’s high in nitrogen over his bales and watering it to draw it into the bale. Now we organic gardeners wouldn’t want to do that. But we could get the same effect by using organic fertilizers high in nitrogen, say blood meal, fish meal, or cotton seed meal; or an organic fertilizer mix with good nitrogen content. Not much fertilizer is needed, but thorough watering is important. But don’t over water to the point where your nitrogen source is washed from the bale. (more…)