These heirloom tomato starter plants (indeterminate, vining type) are growing quickly and I don't know yet where or when they will grow outdoors. I can start seeds and grow starter plants in my apartment but don't have space for sub-irrigated grow boxes and buckets.
I have thought about pruning the growing tip of the plants to temporarily slow down their growth (and perhaps increase stem caliper). I found this informative video when I searched for an answer. The information is from a commercial farmer.
I still haven't decided what I will do. Perhaps, I'll tip prune a couple of plants and see what happens. If you have advice based on your own experience, please comment. Thanks.