Swamp milkweed, Asclepias incarnata
States grown: AL, AR, CO, CT, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY
Asclepias incarnata is commonly named swamp milkweed, rose milkweed, swamp silkweed, and white Indian hemp. It is a perennial that is native in North America but only in the states listed above. It prefers damp to wet soils and has the only seed in the milkweed family that has adapted to be disbursed via water. Other milkweed disperse seed only thru the air.
This plant is often sold as a cultivar for specific color blooms and may be labeled with "Soul Mate" other variations. Cultivar varieties should be limited to your planters because they are not the same as the native plant referenced here.
View Swamp milkweed observations on iNaturalist
View Swamp milkweed plant information at Wildflower.org
View Swamp milkweed plant information at Plants.USDA.gov