Spocastings has its worm farm next to an Orchard on greenbluff. Greenbluff is well known for its rich soil. Sitting at the bottom of Mt. Spokane all the nutrient rich soil washes down the mountain into greenbluff. That's why greenbluff is the ideal place to grow plants. So my worms live in that soil which makes for extremely nutrient worm castings unlike anywhere else around here. So if u want the best we got it.