NMoasis said: I see two or three issues, related.
Is it potted in pure coco coir? Are you fertilizing? What is that container — size? Drains holes?
Looks to me like lack of nutrients. Get it into regular potting soil, feed it a liquid fertilizer, either for bloom & fruit or specifically for tomatoes. And tell us about that pot.
Yes, do not mist. Keep the soil uniformly moist at all times, not soggy. And it should be getting as much sun as possible.
What is coco coir? Im using normal potting soil as far I know. The container is made of plastic and is just something reused from the grocery store. It's about 12 cm in diameter. It has 8 tiny holes about 1/2 cm. I can add more holes, but they wouldn't be any bigger than the premade holes. Do I need more drainage?
I've noticed that a few smaller plants have a purple tint to the underside of their leaves. I've heard that it might be a nitrogen deficiency? Is there any fertilizer that is bad for tomatoes? I have two different fertilizers but neither are specifically for tomatoes. I don't want to kill the plant by feeding them something they can't handle.
In terms of watering, should I be using a watering can, or use a tray?
