Wow, it's nice to see conventional wisdom stood on its head.
How deep was the fresh poop when you transplanted into it? Is there a chance that plant roots went diving through the poop and into the soil beneath it? They might be thriving from what leaches out of the poop and into the soil (sub-soil?)
Even if that's it, I'm still surprised. But then, I still have trouble understanding how "lasagna gardening" can work. Changing my preconceptions is a slow process!
