If you click on the little "meadow" link at the bottom of this post you'll get quite a few blog posts that only partly relate to building a California meadow from your turf lawn. That's because I sometimes glom several topics together on one blog post and the meadow part of the post is minor or incidental or just didn't take more than a paragraph to write up. So, if you don't want to wade through the minutia of a California meadow and prefer to get an idea of the big picture then the short list of most important links is below, working backwards chronologically.
The wildflowers had died and been cleared out (keeping up with the neighbors again) and some yarrow carpeted the meadow area of my front yard - almost like turf grass, provided you were far enough away:
Here's a good time lapse photo history:
This one has the seed mixture and my preparation methods: