Planting tomatoes

I would appreciate some help with this matter. I live in a townhome and am raising all my vegetables in pots. They are doing WONDERFUL, by the way. I had a friend give me a couple of roma tomato plants. I've run out of room, pots and soil on my back deck. I DO have two little areas by my steps that I could plant them in. But.....there is a sprinkler head at each spot. They come on at 9:30 p.m. and 2:30 a.m. for 15 minutes each time. I am wondering if that will be too much water for them? Thanks for your help.

I'd try it if I knew I wasn't going to harm the irrigation system by digging. The worst that can happen is they'll die. The best is you'll have phenomenal tomatoes.  Your big problem may well be splash back from the soil so do mulch them to keeep soil off the leaves and soil borne disease at bay.