Tomato plant care tips! How should I prune my tomato plants? Well first you have to know if you have a determinate or indeterminate tomato plant. If you have a determinate tomato plant you don’t want to prune your plant at all, however if you have an indeterminate tomato plant it does require heavy pruning to prevent it from vining out everywhere, and produce an abundance of delicious fruit. If you have a lot of space you don’t need to prune your tomato plants but if you do want to keep your are