Not sure about type of tomato
I am a brand new gardener.
I was given 3 tomato seedlings as a gift and told they were supposed to Kumato plants. I planted them in smart pots on my balcony a couple weeks ago and I assumed they were indeterminate, but now I am not so sure. They are not really growing as I would think an indeterminate would. In 3 weeks they grew from about 6 inches tall to 3-4 feet (I water about a gallon a day unless it rains). The plant has one thick main stem with everything growing off of that. So far I have been pruning suckers, but now I am not so sure. There have been 0 flowers so far and the plant seems to get noticeable larger daily. Is there any way to determine by appearance if it is DET or INDET? Should I just leave the suckers alone and let the plant do its own thing?
Also one last question. One of the plants had some black spots on a bunch of leaves on two lower branches. I cut them off and haven't seen anything since, though it was sad to cut them off. Can someone advise what it was and should i have amputated?