Determinate tomatoes should never be pruned. Many, many people do not prune indeterminate tomatoes.

Usually, when you purchase seeds or plants, the labeling will tell you whether the plants will be determinate or indeterminate. If not, you can find the info on the internet by doing a search for your particular variety. One of the best places to find the info for heirloom and open pollinated tomatoes is on Tatiana's TOMATObase site.

Or you can post a list here and I am sure the good people on this forum will be happy to tell you which ones are which (if they are known varieties.)

I hope that helps.

Betsy

Here is a link that might be useful: Tatiana's TOMATObase - Heritage Tomatoes

This post was edited by bets on Mon, May 20, 13 at 12:49

Perfect info from Betsy. Question - why do you feel you need to prune any of them? The need to prune indeterminates is dictated by your support system and the plant spacing you use.

Dave

Another reason, in addition to what Dave said, is the seasonal limitation. In zone 5, 4.. the plant would not have enough time to rais all the kidds that it wants so greedily.
from the blossom to ripe tomato it takes 3 to 4 weeks.(?). As a gardner with seasonal limitation I want to get fruits not so much lush green foliage. I need just enough green to support the fruits formation . Here in the Pacific NW, some gardener will pinch off all new growth at the end of summer, Becaust any tomato set after that will not have a chance to become ripe. This is analogous to planned parenthood.LOL