So I ended up using the tiller on the big patch of grass and seeding with buckwheat and some areas in oats. I wanted to try the sod cutter, but I had free access to the tiller. I did this in early May, and it's been a bit slow going but is now starting to speed up.
I have a small square which was planted about a week later on a slope under an old apple tree. I tilled, then planted with buckwheat and fava beans. It's been growing multiple times quicker and is now starting to flower, whereas the big patch in the first picture looks like it's 3 weeks old. The quicker growing stuff gets more shade and is next to a patch of clover.
-On June 8th (about 3 weeks old)
- June 19th (About 5 weeks old)