thanks everyone

Almost all of them will if you feed them plenty of nitrogen. One year when I lived in an apartment I had a drunk neighbor that urinated on the tomato plants, they all grew to be over 15 feet tall. They grew and bloomed like crazy but set no tomatoes. I had to cut them by half and flush them with tons of water just to get them to set some fruit.

All indeterminates will grow if disease doesn't stop them, check this pic from 2017 I grew using the lean and lower method pruning to a single stem. The poles are 8' apart and 7' tall, these are easily 15' and they grew more than that. I also had to prune bad leaves due to blight but they still grew and produced.

Post Office Spoonful grows up & over the 8' deer fence every year.

There is a hundred youtube video's showing you how to prune Indeterminate tomato plants, to form a single stalk. All of them will get around 15'. I use to do that years ago. Now, I only trim suckers the first 2 feet, as blight protection. Then I let all suckers go, because I raise in cages. And every sucker has blooms. PS-- I know this goes against the grain of what most people say. But I grow tomatoes, not plants.
IF I WERE-- To enter in a tall vine contest. And I wasn't permitted to use a cherry tomato variety. I would select Russian Queen, or Persimmon. They both grow over 8 feet, and that is with the suckers. 25% of the indeterminate cherry tomatoes, will out grow the above slicers I mentioned. ALL green houses practice single stem. That is because they have no room to the sides. They must grow straight up.

We had a picture of my Dad's garden with his Estler's Mortgage Lifters well over the garage roof. And they produced 'maters like crazy. Not sure if that picture is in one of my boxes I may have to dig through and see.

Black Cherry is my pick for tall vine, over any other variety I have grown. Too true, they will all grow 15 or 20 ft or longer if you have a long season... Black Cherry though will outgrow them all. JMO.

I've had extraordinarily long vines from Purple Bumblebee (watered well, in full sun) and Lemon Boy F1 before. Sweet Orange Cherry gets pretty long. There are probably plenty of others, but I didn't pay as much attention to the length of those that come to mind, offhand. I had a Husky Cherry Red F? x Sweet Orange Cherry F1 that got extraordinarily long vines (and lots of them); an F2 was also pretty long, but not as long. I think Burpee Gloriana and Sausage got pretty long in 2018, if I remember.

Oh, Coyote can get pretty tall, and Matt's Wild Cherry gets pretty long. I say long when I didn't cage them, and tall when I did.

I tried Trip-L-Crop climbing tomato once up the side of the house …..must have been 20 feet …

I like dwarf tomatoes and container culture ...so I don't do this anymore...but ...WOW for those who like ladders...lol

Indeterminate cherry tomatoes. Black Cherry is a good pick. But also single stem them.

I personally grow my tomato plants to be bushy and spread out, rather than single stem.

+1 for Trip L Crop . I don't grow bc I am short, and often top my indeterminates. Check out Roots and Refuge Farm about Trip L Crop

maxjohnson-- I'm with you Max. I've did it both ways. I'd rather have the fruit, than the plant. LOL

Almost all the tomatoes in the garden top seven feet without any extra nitrogen. There are a few OP/heirlooms that only go to six.

I haven't grown them, but you might want to look into Pasture and Octopus.

Mine routinely get to 6-7 feet without pruning, grown bushy in cages, in Zone 6a. All the "big" ones, I grow, KB, Estlers ML, Brandywine Sudduth... If you are in a zone with a longer season than me, you should easily get even more. Not sure what you were asking for. What exactly are you trying to do? Do you really want just the longest thin single stem for some reason? Are you trying to grow tall bushy varieites?

Yellow Pear will easily do 15' if given the chance by removing all laterals. Some European varieties were developed for growing on poles and will do the same. Hellfrucht/Moneymaker will do 20'.

Martin

Last year my Big Beef and my Goliath went over the sides of my Texas Tomato Cages so this year I bought the Extensions. Have Big Beef, Creole, Brandy Boy, GGWT, KBX and Brandy something in the TYC's taht are now 8'h. We will see which ones go over the tops.

MikeInCypress

The world record for the tallest tomato plant is held by the cherry tomato SUNGOLD. It grew 65 feet (19.8 m) in a greenhouse in the UK. (See Wikipedia)

Other records were held by Charles Wilber who wrote the book
‘How to Grow World Record Tomatoes ‘ which emphasizes overall yield
not individual size. His method uses compost made to exact specifications.

He grew 28 foot tall cherry tomato but doesn’t specify the variety. He does say to grow a record tall plant use a cherry.

He also grew Better Boys that were 18 feet tall.

https://www.acresusa.com/products/how-t ... d-tomatoes

Some of the tallest plants I have grown are Terasenko 6 Terasenko Rozovyi and work release paste

Tomato tree at Epcot Center.