Is there any hope for seedlings that stop growing after sprouting?

I planted some seeds that I have had on hand for about five years. Most of them didn’t sprout and a couple that did sprout basically stopped growing after producing seed leaves. Is there any way to stimulate them to grow? They have been stuck at this stage for about a month now.

I gave both seedlings a dose of Super Thrive about a week ago but I don’t think it helped.

Personally, I would start over.

My guess too wet and if I just had to save them
I would transplant to a bit larger container with dry soil
But start over is an option
Tell ya what
Drill about 6 holes in the sides of the cup and see if a little aeration doesn’t do the trick
Just for shits and grins
Edit ; Superthrive is junk science
Let the roots stretch and don’t add anything
What have you got to lose ?

Jim Haddar said:

I planted some seeds that I have had on hand for about five years. Most of them didn’t sprout and a couple that did sprout basically stopped growing after producing seed leaves. Is there any way to stimulate them to grow? They have been stuck at this stage for about a month now.

I gave both seedlings a dose of Super Thrive about a week ago but I don’t think it helped.
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They don't need anything but tap water till they begin to crown the first 3 finger leaves. You probably hurt them with the S.T. I also agree looks to wet. Me personally I like to start my seeds in rockwool. Transplant into anything or add to more rw.

What are they planted in? That will help with a answer

Older seeds sometimes lack the strength to make that transition and may stall as in the pics. I much prefer insane vigor.
Trying to solve will probably just delay their replacement. Most times I just pull and replant. Just did so this week, was trying to save some of my older seeds which stalled.