Solomon's Seal is a hardy ground perennial that grows well in shady, moist areas. While it may be evergreen in some warmer climates, like USDA zones 8 and up, in many cases it dies back in the winter. If you have this plant as ground cover, or just for the interesting tubular flowers, you can easily protect Solomon's Seal from the coming frosts. If you live in USDA zone 7 or lower, you will need to winterize Solomon's Seal.
Water Solomon's Seal less as fall approaches. Cut back watering to about once a month for 5 minutes each watering until the ground freezes.
Remove any flowers from Solomon's Seal. Leave all other growth alone.
Add compost or manure to the soil around Solomon's Seal. Work it into the soil a couple of inches deep.
Place 3 to 4 inches of mulch on top of Solomon' s Seal after the first frost.