Tomatoes - I live for fresh tomatoes.

[KurtNYC]

3. if they have a lot of foiliage but few fruit that could be excess nitrogen

We have some that have outgrown the 6 ft stakes and I want to cut and root the tops. They are producing beaucoup.

If you are growing in a container then in hot weather I would water daily, first thing in the AM and directly to the soil, just until you see the container start to drain. In cooler weather, maybe soak every other day.

What variety are they? If they are determinates, like Romas, then you won't get ripe fruit until the very end and the whole plant will go at once. Determinates usually need a little extra fertilizer or top dressing between flower and fruit. If you see color draining out of the lower leaves then your plants may need additional nutrients.