queen vic lobielia and campanula alba

I reckon to overwinter the lobelia under glass to protect it from the worst of the weather - more likely to see it again next year then

thanks andrew,they are about a meter high,do i simply cut the stems down to the foliage?

I leave mine until they go out again in the spring but I don't think it makes much difference

would my geraniums be ok in a cold frame over winter?,also ive put spring flowering bulbs in containers and placed them against the house wall under a table,do i need to water them at all?