I noticed you advocated using horse manure, and that's great, however, for some people who may purchase horse manure on the side of the road, you know the ones "$2.00 a bag Horse Manure", one thing you have to keep in mind is that the owners may have wormed their horses and if so, any manure that is derived straight after the horses have been wormed is likely to kill any worms in your garden when they come into contact with it.
