I love this little weed. The Calendula arvensis is blooming all around the Napa Valley right now, looking for all the world like a blanket of sunshine on the unmowed vineyard floors. It is such a pretty and cheery looking little plant, much more pleasing to look at than the straggly mustard growing, in many instances, right alongside it.
The field marigold primarily inhabits disturbed coastal and urban sites, but it is expected to greatly expand it's range in California. I hope so: I'd be quite happy to have it inhabit every square inch of Vinoland.