....and it is June 15 and I live in Zone 3-4, I'm not going to get anything off of them....am I...? THey are growing very fast, but I had to plant from seed due to SEVERAL setbacks with my indoor potted plants...
I've done that here and still got some (late-season) tomatoes. (In fact, I put in some much-abused 10"-tall overlarge potbound transplants on July 5 one year, the day after we closed on this house, and still got a few tomatoes in late August and early Sept... and that was in totally unimproved unfertilized untilled clay-with-lawn-still-growing-on-it )
It depends somewhat on how hot a summer it is, but I'd say leave 'em in unless you have something else you particularly want to do with that part of the garden. SOME homegrown vine-fresh tomatoes are still better than NONE
Well, you can "wall o water" them on the back end instead of the front end. When the nights start getting cool surround the plants with 2 liter bottles full of water.
You'll be surprised how fast they can grow when the weather is right. Unless you have a very long season tomato, like Brandywine, you just may catch up!
Here are my lovelies last night. The nice thing is that it wont start getting cool here till the end of Sept so I can be harvesting tomatoes thru the first half of that month too.
I'm in zone 4 and some of my transplants are smaller than that. If the weather cooperates you'll have plenty of tomatoes! Once your fruit is formed, if frost is predicted, you can pick and cover with newspaper inside. They will ripen up nice for you. Good luck!