Buy Flowers › Antirrhinum majus 'Johnny's Potomac Custom Mix' - 6-Pack Antirrhinum majus 'Johnny's Potomac Custom Mix' - 6-Pack $8.50 Custom blend of warm colors, these are warm season snap dragons more suitable to summer weather (hot temps and long days), 32-48" tall, sun/part shade Add To Cart Added! Custom blend of warm colors, these are warm season snap dragons more suitable to summer weather (hot temps and long days), 32-48" tall, sun/part shade