I have some spider plants that I grew from babies from a parent plant.
They were mostly doing "OK" until a few months ago when the new plants simultaneously lost all their leaves suddenly - the leaves became very thin at the bases and then dried out and fell off. I blamed this on very dark indoor conditions caused by keeping blinds closed during hot summer weather. Since then, they have been on indoor windowsills (some east-facing, some west) in a north European climate.
The plants are watered a bit, but not a lot (no standing water in the bottoms of the pots). The soil is mostly potting compost and a handful of perlite.
Since "the great die-back", they have just kind of coasted along, not growing any substantial amount and what there is looks pretty sad and stunted.
For example, here is the first one that I propagated (it was much bigger and bushier at the start of the year and had even made its own babies). It's a sad remnant of what it used to be:
The mother plant (in a different part of the house) is much larger and still going strong and throwing off babies left, right and centre, so I don't feel like the size of the pots or the water should be an issue? The roots seems dense, but don't look otherwise unwell.
Should I just bin these and start with some fresh babies? What went wrong this time and how to stop it happening again?