I have a small outdoor space, essentially just a light-well outside our basement kitchen (approx. 2m square). It gets good sunlight in the mornings - enough that I was able to grow tomatoes and chilli peppers this summer. As it is below ground level, and we live on the coast (salt sea air), it doesn't seem to get frost. My mint and catnip survived well through last winter. I'd like some tips on hardy plants that will survive the winter in pots to keep our outdoor space looking attractive (we might try and sell our flat soon). My initial instincts are herbs, lavender perhaps, and to get decent sized plants that are likely to withstand the winter better. Any and all suggestions will be welcomed with open arms!