Hi. You should be able to find Solomon’s Seal at your local nursery, at least this time of year. It is a perennial that prefers partial to full shade, so you would want to look in that section of the nursery (usually perennials are separated from annuals, and plants that prefer sun are separated from those that prefer shade). The native species is Polygonatum biflorum, and you can read more about it on this page from the Missouri Botanical Garden and this page from the Lady Bird Johnson Wildflower Center of the U. of Texas. I did a quick search, and you can also purchase small plants online from native plant dealers. In the landscape, it is much more common to find the variegated cultivar ‘Variegatum’, which has white leaf margins. Its full name is Polygonatum odoratum var. pluriflorum ‘Variegatum’, and you can get more information from the Missouri Botanical garden about that cultivar here. It was the Perennial Plant Association Perennial Plant of the Year in 2013, which means it is a good choice for the landscape and is still available at most garden centers, so you shouldn’t have trouble finding it. This page from the U. of Wisconsin provides a nice overview of the genus Polygonatum and other species and cultivars that you might be able to find.