This is my first time growing tomatos and I have heard different opinions on whether or not you should prune these suckers. What are your experiences and opinions? Looking forward to learning from you!
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You don't have to prune at all but it is a useful control technique. Each new sucker that grows will create a new growing tip. That tip will continue to grow in that direction and any new suckers from it later will become their own vines, and so on.
If the tomato is an indeterminate variety, pruning is more important because the plant will tend to out grow the pot if you don't.
You can stop any tip by pinching off the last bit of growth and it won't affect the fruit behind it. Just leave at least one leaf branch above and below where flowers/fruit will set.
Pruning will speed up fruit development also, useful for end of season frost concerns.
If, however, you see "determinate" in the variety description or on the seed packet, don't prune it at all. Determinate varieties stop at a certain size on their own.