This wide-ranging US native is found in all but 7 of the continental states...sorry, Northwest. Asclepias 'Hello Yellow' is a golden-yellow seed strain that comes remarkably true within the range of yellow-gold. This drought-tolerant deciduous species makes a 20" tall x 2' wide mound of stems clothed with index finger-sized green leaves and topped in late spring with branched spikes of golden flowers...a butterfly favorite. Pot size: 24 fl. oz (709.77 ml)