This year I am trying the if you plant it they will come thing.
It worked last year with milkweed, which I had in abundance. And last Summer I had more Monarchs in all stages except chrysalis (never saw one) than the prior 5 years combined! I saw lotsa eggs, watched one hatch and saw all 5 instars. And many adults and lotsa mating rituals. This year I will have nearly 100 MW plants.
New this year: 3 types of fennel, parsley, dill and rue. Will also have passion vine of size - 5 plants that I started from seed Feb. 15 - all have recently pooped out of the ground. Hence name MayPop.
I also have a Spice Bush but never seen anything on it.
And for good measure, I planted 2 Paw Paw last Summer.
And for the future, just planted a small dutchman's pipe - the hardy one here A. tomentosa on an arbor.