@logicalelegance @alison @akkana I was surprised how selective the Monarchs are for specific types of milkweed.
Last summer we almost always had a few Monarchs fluttering around our gardens.
I planted at least two kinds of California native milkweeds. The Monarchs clearly preferred the variety with the long thin leaves. (So I gathered seeds from those plants and will be starting them soon in my greenhouse.)
The Mediterranean milkweeds have nicer looking flowers - that's the variety that is planted all around the Santa Cruz city hall.