Buy Flowers › Centaurea orientalis - 4" Pot Centaurea orientalis - 4" Pot $7.50 Yellow thistle-like flowers with silvery hairy buds, 2-3' tall, sun, drought tolerant, zone 6-10 Add To Cart Added! Yellow thistle-like flowers with silvery hairy buds, 2-3' tall, sun, drought tolerant, zone 6-10