Buy Flowers › Oxypetalum caeruleum - 4" Pot Oxypetalum caeruleum - 4" Pot $6.00 Tweedia, pale blue star shaped flowers mid summer through frost, scrambling/climbing plant in the milkweed family, great seed pods, 3’ tall, sun Add To Cart Added! Tweedia, pale blue star shaped flowers mid summer through frost, scrambling/climbing plant in the milkweed family, great seed pods, 3’ tall, sun