In Arizona it may not be this easy, but here, just mow once a year. Less often and the milkweed will be outcompeted by woody plants, more often and it won't be able to take hold. Other than that, it's very, very easygoing. Make sure to water sometimes, though I believe it's also drought resistant. Once established, it's honestly hard to get rid of.
You have so many species of native Asclepias so you should be able to find quite a few that are suitable to grow if you have a garden? Usually here we have to cold stratify seeds ( keep moist and cold for 3-4 months, fridge or outside over winter) but not sure your native milkweeds need a prolonged stratification period. You can wild collect seeds in late summer and fall and prepare them for germination next year, it's not the ideal time to do so now. Alternatively some nurseries sell potted plants and you can start with one of those and then harvest your own seeds.
I took one milkweed plant and allowed it to produce seeds. I now have hundreds, if not thousands of milkweed seedlings all over the place. You can also grow the tropical species (A. curassavica) from cuttings. In conclusion, they are pretty easy, although some species may require supplemental watering in AZ.
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