Window boxes: Liners or no liners? pros/cons
What are the pros and cons? My husband built some lovely window boxes (although I use them as planters to line my front porch.) I overwintered tulips in my garage in plastic liners and just brought them out to place inside the boxes. They look lovely! :) I'm looking ahead to next month when the tulips are gone and I plant my annual flowers there. I'd like to just plant them in liners because: 1.) Just seems easier and neater 2.) I plan to always do spring bulbs and I have to keep them in the garage over the winter because I'm zone 5 and they will freeze if simply planted in the planters... If I have dirt in there from the summer plantings it won't be as easy to just set them in.
The cons to liners as I see it is: The liners are shallow, and I'd have much deeper space if I just filled them with dirt (there are drain holes in the planters btw.) And I'm not thrilled that you can see the liners up close.... with the tulips, you can clearly see them but I wonder with annuals like superbells, etc. they would hopefully spill over and hide them, so maybe that wouldn't be a con after all.
For those of you who have tried it both or either way, what are your thoughts? Thanks a bunch!