Getting ready to plant radishes.Double Digging, Trench composting, Horse manure.

I am experimenting with hot beds. I am filling the trenches with about twelve inches of horse manure. I am curious if it will raise the bed temperature and speed germination. I dig a trench and work up the sub soil with a potato fork. Then I filled the trenches with the horse manure. Everything is covered with 6-8 inches of top soil.