I'm having a terrible time with my tomato plants and could use some
advice. This is my first time growing them.

I'm growing a Big Boy, Better Boy, and Patio, each in a 5 gallon pot on
my porch. They were purchased from a store in May and planted a few
weeks later. By the middle of June, there were already two little green
tomatoes on the Patio one. Just today, the Patio produced the first two
ripe tomatoes of the season.

Other than that, none of the other tomatoes are ripening. And there are
only a few tomatoes on each of the plants. I would say maybe 3-5 on
each plant. Then, within the past two days two hornworms decided to eat
up most of one of the plants (either the Better Boy or Big Boy) and
another hornworm was on the Patio one but it didn't get that much
damage.

Do my plants stand a chance of producing any more tomatoes? It seems
like something is wrong with them. Shouldn't they be producing more
tomatoes by now? I'm thinking they're not getting enough fertilizer or
something like that.

When we planted them, I followed the advice of a relative who said to
plant them in a mixture of potting soil and some dirt from the flower
bed. I had been using a liquid fertilizer similar to Miracle Grow but I
thought I was using it too much so I haven't used it in a month.

Any suggestions on what I should be doing? Honestly, I don't care so
much if the tomatoes don't ripen because I prefer fried green tomatoes
anyway. Also, is the Better Boy resistant to hornworms. It's strange
that only two of the three plants were affected by them.