I have found several plants "keep on keeping on", in my containers when spring arrives.
|Here is Lamium maculatum "pink pearls". Dead Nettle is the common name. I use it in the corners as a trailer to spill over the container. Quite drought tolerant and has great frost tolerance too.|
|Here it is again. There are many cultivars are on the market with silver foliage, white, pink, pale purple flowers. Some golden foliage, some variegated. Plenty to choose from.|
|This hosta looks as though it's planted in the garden.|
|Nope! This hosta fills a spot easily and can be moved to change the garden design when necessary. One great aspect of hostas in containers: less watering than annuals. This is a great choice for those cottage dwellers on weekends. ;)|
One key element that needs to be mentioned is drainage. All these pots have good drainage. This is essential. Any perennial that stays soggy and freezes in total water may not survive in a pot. Be sure to notice that the containers drain thoroughly. If you're worried that soil will wash out from the drainage holes, stick a pine-cone or large gravelly stones over the hole. This way water drains, without soil.
With hostas, it's better to group the pots together, insulating them a bit if placed in an exposed area. Sometimes hostas require no garage placement, sometimes they do. If the hostas have outgrown their pots (root bound) some dieback is noticeable overwinter. If you leave them outside in pots, group and situation in an area with just enough protection from the prevailing winds.
What perennials have survived overwinter in your containers?