Taprooted. Combine with a shorter groundcover to hide the weedy appearance and occasional defoliation by caterpillars. Sunset lists this species, but not other Asclepias spp., as attracting adult butterflies (they all serve as larval hosts), but Stoecklein claims that A. incarnata also attracts adult butterflies.
Wild Ridge Plants considers this a "specialized, niche-adapted" species, not as easy to grow as A. incarnata or A. syriaca, and not for the homeowner who just wants monarch butterflies. Wikipedia cites several sources stating that this species is not a preferred monarch host anyway, due to the lower toxin content giving less protection from predators.
Salt tolerance is debated (UFL vs. NCSU), as is growth rate (USDA and NCSU vs. UFL and Stoecklein).
Sources: UFL, Sunset, Stoecklein, NCSU, USDA.
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