Vi & Rene wrote:

I am new to this news group and I am hoping to get some pointers on the best
methods of pruning tomatoes, or places I can look to find more information.
I am in a northern climate with a short growing season...




Removing suckers and later fruit clusters will produce earlier fruit by
a few days, but will decrease overall production. If you're in a real
northern climate, you might need those few days for real vine-ripened
fruit, although if the fruit is almost ready it will ripen off the vine.
I think that ripening the fruit on the plant is best if you have that
option without hitting frost dates.

If you have several tomato plants, you might prune 20% of them and leave
the rest. This will give you an idea of how effective it is for your
area.