What are these mushrooms doing in my straw bale? When starting a straw bale garden, nitrogen is added to bale the kick start the break down of the straw releasing nutrients for growth. This process, in addition to the ongoing moisture in the bale, results in the growth of mushrooms. These mushrooms are most likely not edible (I am not a mycologist and would never recommend eating unidentified mushrooms) and are not harmful to the plants in the bale. You can cut them or pull them or leave them in place. Isn’t that baby squash plant adorable? It is a Zucchini Mutable, an open sourced organic seed from Adaptive Seeds in Oregonhttps://www.adaptiveseeds.com/product/highlighted-varieties/certified-organic-seeds/zucchini-mutabile-organic/.