Wow, that is a long time. The small, one gallon pots might be part of the problem, but if you have one red one, that's a good sign. Hopefully the rest will ripen soon. What kind of mix are you using in your container, and do they get a lot of sun?

It was 100 degrees or close all of July here. The tomatoes ripened all at once it seemed. In the fall I will have big green tomatoes that take forever to get ripe and sometimes frost threatens them before they do. It is your climate. You need varieties that will suit your climate and a warm spot with lots of light because you are far north of me and most people on the forum. Unless they look at your page, people don't know you are from Great Britain. If you put that in your question you might get a proper answer.

i am useing compost from a grow bag i prefer to put it in pots as you can control watering more effectivly.
Brett

Pots are fine but not 1 gallon pots! Slow, stunted growth, root bound plants, and heavily stressed plants is all you get in pots that small. Try using a pot 10 times bigger than that. 5 gallons is the smallest container used and most prefer much larger than 5 gallons.

There are very few, if any, tomato varieties that will survive, much less do well, in a 1 gallon pot.

Dave

Yes, 1 gallon is far too small, especially for indeterminate cherries that will grow into huge plants. I use 5 gallons for small bush tomatoes like Tiny Tims. I would go much larger for a cherry. I only grow cherry in ground due to it's large size (usually the largest tomato plants I grow). But if I was to grow in containers, I'd go minimum 10-15 gallons.

Also, compost is not a suitable grow media for containers. Please refer to the container forum for better soil mixes.

In addition to your container, I would also bet your soil is too heavy. Compost is basically the same as growing in garden soil. It is too heavy. You will get an 18-inch plant with a handful of tomatoes. Get a 5-gallon bucket and a bag of at least Miracle Gro potting mix and you should do OK.

You will do better if you can grow in the ground if possible.