encouraging root growth (leggy seedlings)

[fructose]

I have some seedlings that had been neglected and grown in poor soil while I was moving my garden.
They have valuable genetics
They're still leggy and I realize the stem extended quite low without roots (getting white / pale where the sun doesnt reach). It makes me worry about possible rot but they haven't showed such yet.

I want some of the stem to start growing roots (as you would with tomato plants if that makes sense).

Should or can I add rooting hormone to these places in the soil?

[Vlad]

Post some photos so that we can see what you are talking about.

[millet]

Are you suppling bottom heat to the root zone, If so at what temperature are you maintaining?  If your cutting has not started to produce any roots, and the cutting has no steam rot, you can just pull it out of the soil, and dip it into the rooting solution.  You should have already striped a striped off the bottom 1/2 inch of the cutting and then dipped it into the rooting compound.