They'll probably do ok, though perhaps a bit smaller, but not a very large difference. Tomato seems pretty good at splitting and re-healing. Once the base of a huge plant I had split just like yours and I repaired it. I had a little length of clear tubing (Tygon brand, though there's not much special and the tubing doesn't even have to be that soft)

I cut a segment about 1.25" long and split the side open. Then I put it around the break and wrapped a loop of heavy duty flexible solid large gauge wire on the outside, two bands, one below and one at the other end, leaving enough pressure to sew back up but not to much to stress the plant and the split provided some aeration . After a few weeks I removed it and found lots of scar tissue and a clean heal, though there were also a few adventitious root stubs poking out, they took care of themselves in the air later and it healed up fine. It was probably unnecessary and maybe even a potential source medium for infection since it was in the middle of the garden unprotected, but in the end it worked fine and there was always a humid condensate on the inside of the tube except by the split which provided a little air. Probably would have ended up just fine if I had tenderly trained the two ends from the split.

Cheers!

PC

I find with any break that isn't complete the plants do best when left alone. As PC said they do just fine fixing themselves. Usually trying to 'fix' it only makes it worse.

Dave

Pot growers bend and partially break their pot plants at a certain time. This makes the plant heal itself and makes a big knuckle where it was damaged. It makes the branches stronger thus making more and bigger buds.

Ahh, I feel better. Thanks, guys.

I did end up just tying the two opposing sides to two bamboo stakes I had on hand so that they (hopefully) can't completely split. At this point, they can bend further down the branch but not from the stem. I hope.

Because one side is so heavy with fruit and the other side is almost completely flowers, I couldn't sleep thinking of the flower side getting heavy and tearing that essential main stem in half.

PC, what you're describing is so fancy LOL!

In hindsight, I should have just caged it. Because I normally grew them facing out and three plants to a pot (limited space in an SF apt), I didn't think ahead enough to how much bigger it would get by itself, or how evenly it would sprawl.

Lesson learned!