Allotments 4 All

I sowed some iceberg lettuces a few of weeks ago in a heated propagator. They all came up, but after a week or two they are very leggy.

Can I rescue them by planting them deeply when I pot on, or is it best to start again.

...actually I've got the same problem with some other stuff I've planted ( mixed salad leaves and little gem ) :-\

salad stuff does not need heat just warm window sill will do   or even a frost free green house  i would be afraid they might rot off if planted deeper you could always try  as nothing ventured nothing gained

If you plant them at their present depth use some free draining stuff... eg compost/sand mix to earth them up... to reduce the chance of rottting.  :)

I have actually direct sowed a little clump of my spring lettuce and cloched it. I never get salads or brassicas to work indoors, they don't mind the cool.

As they are a quick crop I would just start again.
As others said, no heat needed, just more light, if growing on a windowsill I use tin foil stuck on some card behind them to increase the light level.

I do have loads of seed, so I think I'll start again. As soon as they are up and have a few leaves I'll transplant to a cold frame.

Use them as microgreens?

I germinated some mixed lettuce seed (had spilled packets and scooped them up again) in damp cloth and they shot into action faster than expected. Some are planted into a long gutter, spaced out for later planting in the ground, and the mass are in a shorter gutter, coming up thickly, encouraged to get leggy, and will be scissored off into salads soon, like cress. Better than throwing them away.....