After watering our straw bales for three days our next step is to apply a high nitrogen fertilizer. We’re following West Virginia University Extension Service’s Straw Bale Gardening advice. They suggest a 1/2 cup of urea per bale or “bone meal, fish meal, or compost for a more organic approach.” (I think they mean blood meal as bone meal does not have much nitrogen in it.)
Choosing the organic approach, we’re watering in two cups of blood meal a day to each bale for days four to six. Days seven through nine, we’ll cut back to one cup of blood meal per bale. By day ten the bales should be almost ready to plant.
Once the bales are conditioned I’ll need to add a balanced organic fertilizer to provide potassium and phosphorous. And I discovered that taking the time to level the bales prevents fertilizer from running off when you’re trying to water it in.
Buying a high nitrogen fertilizer, even an organic one, is a bit of a conundrum. I object to chemical fertilizers, like urea, on philosophical grounds, but blood meal, a byproduct of our industrial food system, doesn’t make me feel much better. Urea would be a lot cheaper.
Perhaps the best solution would be human urine. Throw a week-long party, serve a lot of beer and invite your guests to fertilize your bales! Undiluted human urine has an NPK ratio close to that of blood meal.
Those of you who have experimented with straw bale gardens please leave a comment on what fertilizers you used and how it worked . . .