At first glance Solomon's Seal makes us think about Lily of the Valley (Convallaria) and the striking resemblance is fully justified as both plants belong to the same botanical family. What is more, they show similar requirements: shady locations, moisture retentive but well-drained soil, that is why they do so well planted under big bushes and trees. Polygonatum needs more room, though, because the its stems grow up to 1.2 m (4 ft) and they need ample space to arch gracefully. Not only stems are so keen on having more room at their disposal but the rhizomes too show an unquenchable appetite for new territories. And their wise determination -if left uncontrolled- may result in wide outgrowing the neighbouring plants. In order to avoid such instances, it seems also wise to separate the area where the Polygonatum grows from the rest of the border.
Despite its conquering spirit, Solomon's Seal grows well in containers, another great example of its rational behaviour reflecting the origin of its common name. And it does well in full sun, too. Taking that into consideration, now you can think about decorating the balcony or the patio with the graceful arches starting the next spring. Young plants of Polygonatum are easily available in all sorts of good garden centres. I am sure you can get some from your neighbours, whose garden might be full of that beautiful plant, ready to share the vigorous rhizomes with you. Certified by Solomon himself.