Within the genus Yucca serverel variegated forms are known. 'Color Guard' and 'Golden Sword' being among the most common and these are easy, cold hardy plants. Another plants often sold in garden centers is Yucca gloriosa variegata. Showing lots of variegation the plant is not particular cold hardy and it dislikes both our summer and winters here in Scandinavia, both being too cold, too wet and the winter too long.
Some years ago I sowed a handful of seeds from a Yucca filamentosa collected in Connecticut. 3 plants germinated, one being with green yellow leafs and one showing variegation.
One of the yellow, green Y. filamentosas from Connecticut.
The flowers were yellowish and bell shaped.
Yucca filamentosa 'Rigmor'.
It does share similarities to Yucca gloriosa variegata but is much more hardy to both cold and rain. I decided to name it after my daughter Rigmor.
The flowers were very different from the other clones wíth almost pure white flowers. So far I have not distributed the plant as it is a very slower grower.