- Small mound of wavy green foliage, so not too exciting. This plant is wanted by hosta collectors as it is the first hosta with yellow flowers. Yes, it is classified as yellow, but it is a very pale yellow at best. Or a pale, greenish-yellow. And for us hosta collectors, we are totally entertained with excitement waiting to see our first yellow hosta flower. Fertile flowers for breeders. Matures about 12” high and about 24 inches wide. Zones 3-9.