- You Will Get 50 Seeds Of Aster Duchess Yellow Peony Flower Seeds. - Sunlight: Full Sun. - Watering: Medium. - This is for 50 Tall Peony seeds these are the Yellow Aster. - These make a very nice cut flowers for vases this is a later blooming flower. - This flower gets to be about 28" tall this is a great flower to add to any garden this is a annual.