Name: Rick Corey Everett WA 98204 (Zone 8a) Sunset Zone 5. Koppen Csb. Eco 2f
Tjhey are great for rocky soil. try it, you might like it!
P.S. I spent two years using a pick on straight clay "because it was so hard". DUHH! Spray a little water on it the day before or a few hours before, and it SOFTENS!