I just noticed you are in Utah. We have another gardener on the forum who grows in Utah. His name is Jal_Ut. I believe he grows at 6000 ft. of elevation. If I remember one of his posts recently, he said he doesn't grow tomatoes because tomatoes are a warm season plant and his warm season in Utah is simply to short for tomatoes. If your season is as short as his, that may be the reason your tomato plants only get about 2 1/2 feet tall. They do need an extended growing season to get tall.
Ted, I'm going to respectfully disagree with Jal_Ut on this. I suspect my zone 4 in Wyoming, which is also 6000 ft in elevation, has a growing season similar to his, and I have had some spectacular tomato years, with tomato plants up to the eaves of my house. (They would have gone above that if I could have figured out how to support them
It takes a little more work, though. This year, I started my seedlings on March 16. Naturally, Wyoming had a cold spring, with our temperatures running 5 to 6 degrees below average all through May. I had to set my guys out on May 10 because they were too big for the light table. Three days later, we got 6 inches of snow. Last week we had another snow, this one lighter but fiercer. I've covered these puppies every night but two this month!
They've made it so far. Based on past experience, we'll have another hard freeze sometime around June 8. Nevertheless, I think it's worth it, and yes, supagirl277, I believe these tomatoes will go at least 6', although it's early to tell. I think variety is extremely important. Like TZ -OH6 said, you'll want to go with an indeterminate for size. The best tomato plant I ever had for production and size was an Early Girl. Second best were Yellow Pears. This year I'm trying Delicious.
Give it a try. I think tomatoes are second only to peppers in terms of grower satisfaction. They're both a little more work in our climates, but they are incredibly generous if you treat 'em right!
Oh. Re: Blossom removal. I don't let my tomatoes keep their blossoms for the first two weeks after setting them out. I want them to concentrate on developing a healthy root system. After that, though, I never strip a blossom. My Delicious plants are now producing blossoms I can allow them to keep. I'm pretty excited. I might have a tomato by the end of June.
JONA878, I'd really like to see a photo of the trellis you described. Have you got one on hand? Is it something anyone can make, or do you purchase it?