Dale,

They are getting 1/2 strength ferts every watering.

STOP THE FERTS!!! Your picture shows classic fertilizer burning. (Sorry for the shout.)

An exceprt from the Missippi State University Extension Service "One of the most common is the 'if a little bit is great, then a lot is going to be even better' practice of fertilizing tomatoes and other garden plants with ammonium nitrate and other fertilizer materials. Over fertilization leads to burning of roots, irreversible plant wilting, and frequent plant death. Initial symptoms of fertilizer burn often show up on leaves, which may turn brown and appear to be 'fried.'"

To rescue your plants you may want to "flush" the pots with plain water and allow them to drain well. Then only water when the pots get light and the surface is dry, but before the plants wilt. If they don't recover, you might get to start over.

Unless your plants are more than 10-12 weeks old, they don't need additional fertilizer since most commercial growing mediums have sufficient food for growing transplants. Even when people grow plants in large containers, they usually only feed with half-strength fertilizers once every week or two.

You have over loved your babies.

Betsy

Flood those plants. Wait ten days, and then feed again every 10 days, with a 10-10-10(pellet slow-release). They have already become accustomed to the fertilizer. Do not just stop fertilizing.

This is assuming they are hitting real soil soon. If not, water the hell out of them for 48 hours, then leave alone until they are ready to go into the ground, or transplanted.

Looking at the top growth, I think you are okay, but after the flooding, wait a while an watch your top growth.

Dale, I would agree with Betsy.
Susan

There are different methods to get to the same place. First of all, what kind of fertilizer ratio are you using, as well as your average temperature since you have had the plants?

I would love to know, since I am learning/reading at a high rate at the same time myself.

I had the same problem with my tomato plants and didn't know what it was ~ thank you so much for that information!

Here is a link that might be useful: Yard Tools Reviewed

As others have said, stop the fertilizer and flush the pots. Seedlings need very, very little in the way of fertilizer. Most of that is supplied by the growing medium itself.

I plant 8-10 week old plants directly into the garden without so much as fertilizing them once in some cases and I have great results. Occasionally, I may add a very dilute organic fertilizer at the 5-6 week mark - it depends what mix I'm using and what my plants look like at that time.

Okay, it's been said...fert. burn. Do the flush as it's been recommended. I'm not an organic grower per-say, but I DO use a fish emulsion fert. on my seedlings and new transplants.
I use spray-n-grow (cause that's what I have, lol) and the plants ADORE it...however, I'm not spending the kind of money on it for a weekly follicular feeding no matter how much they like it, lol.
I use it as a soak for the seedlings, and for transplants, I (about a week before the garden transplant) prepare the planting hole with regular bone meal, to let the soil start amending, then I use the emulsion again at planting to make sure it's got plenty of nutrient+water at that time.

Here is a link that might be useful: Small

Sorry for the late response for all the input. Thank you all very much.

Dale