[wrinkly1]

my brussel sprout seedlings are 2ins. high and look thin and floppy. i have them in modules. in top class compost. humax. at the moment i have them in my polytunnel. should i move them out or pot them on '.all advise welcome .cheers wrinkly1.   

[DD.]

Sounds like they've got a bit warm - brassicas hate it.

I'd move them out, let them recover, then pot them on.

[sunshineband]

Planting them up to the first proper leaves sorted mine out 

[Totty]

If your using humax full strength potting compost, it may be a bit nutrient rich for seedlings, too much nutrient and heat I reckon.

Totty