You can maximize space by using 'shelves' of crates on their side. All of my tropicals like elephant ears and gingers are cut back in the fall and put in the crates - I start actively watering again about the beginning of March so by the time I can unload the greenhouse they are starting to wake up and grow. On the top I use shelves I found at the thrift store that are solid so water drains behind and not into the crates. It's also a good idea to not put pots directly on the ground since it encourages ants to take up residence.
The crates are awesome as I use them in summer to put plants on which help keep ants out of the pots.
I frequent thrift stores once a week and buy every crate I see. I must have over 100 now.
