University of Maryland Extension recommends that you do a soil test every 3 years or when you are having problems with your plants. Here at Derwood Demonstration Garden, we make sure to do them at least every 3 years. Enclosed are the test results. If you want more information on soil tests, please check their website.
Our Compost team was experimenting to see if there was a difference with the compost depending on the material you make the compost with. We tested compost made from just our garden waste. We also tested the compost they made with our garden waste as well as kitchen waste from a commercial location. To compare, we tested Leafgro which is provided by the county.