Hi Anita
Is there any way you could give them a shot of brighter light for a few days to see if they perk up? If they are leggy but dark green, I would suspect not enough light.
If pale green and not tall, like not growing at all, maybe rootbound, or maybe need a little bit more fertilizer.
Have the roots fully filled their pots, right down to the bottom? If the mix is saturated with water in the lower inch or so (like perched water), the roots may lack air down there, and be unable to go deeper. In that case, they might benfit from setting the existing pots on a capillary mat, or using a coarser mix when you pot up.
Or even take them out of their current pot, add a wick to the bottom, going out the drain hole, and return them to their pot. But it would seem easier to pot them up instead, if you're going to that much trouble.
You might pick 1-2 plants, and pot them up as a way of examining the root balls. If they are already quite root-bound right down to the bottom of the pot, probably potting up the whole bunch is needed.
If there are only a few few roots in the lower inch or so of soil, they are probably drowing, so give them some air in the current pot, or a bigger pot.
