I'm considering planting Asclepias speciosa, Asclepias incarnata and Asclepias tuberosa in my garden. Can you advise me on the current status of these varieties in Oregon? I don't want to introduce any noxious plants.
Asclepias isn’t on the Oregon lists for invasive plants. Here is a publication about the milkweeds: https://www.xerces.org/wp-content/uploads/2011/10/OR-milkweed-guide_XercesSoc2.pdf And another, this one an OSU blog about the native showy milkweed: http://blogs.oregonstate.edu/gardenecologylab/2017/06/26/plant-week-showy-milkweed/