They look like they're starting to go into dormancy, actually. That's normal. The caudex looks great on each of those.

Some will, some won't. I have some that insistently refuse to go dormant even when I've tried to force the issue with cooler temperatures and low light. Those are my winter friends. One's the same year after year, the others tend to vary. Others drop into dormancy easily and regularly.

When dormant, you can turn the lights off and put them on windowsills until spring. Water monthly and don't bother feeding them at all. Basically, treat them as a cactus.

If any stay green due to their size and youth, the light level might be a bit low to keep them happy. I use 40 watts of mixed light (24 watts LED warm white, 16 watts red-dominant LED light) at about 8 inches plus a southern windowsill. Of my babies this year, it looks like four or so will be up late partying.

It's better to let them go dormant, the resulting resurgence of vigor compensates for less growing time (esp if you're in a colder darker part of the world). I sometimes restart mine in February in a warm sunny south window...don't necessarily have to wait till it's warm outside.

True, if you can put them into dormancy, do. The ones of mine that do, do better. Much better.

Since I have ten adults (plus babies), if two stay out of dormancy, I don't mind so much and I enjoy the winter greenery here in Pennsylvania. I might even, with enough lighting, force a blossom or two... They look nice with the winter ageratum I sprout and grow on the windowsill.

Oh interesting. I did not know that. I thought I read somewhere that the first year it wasn’t good for them to go dormant, but it sounds like it’s better if they do.

They're capable. Even those that keep their leaves and stay green are technically "dormant" when growth stops. Slow watering to once or twice a month unless the caudex gets soft and wilted, in which case step the watering up a bit again.

Too little is better than too much, as long as you have an eye on it to catch a wilting caudex.

One baby (about the size of yours) of mine has already lost leaves, many more are going fast. One first-year cutting is dormant at the levels you show. Others have green leaves, but growth stopped around September 15th. Some will slowly lose leaves over the next month or so, others will keep those leaves, but they're definitely dormant.

I only have two remaining that are continuing growth--one very slow, one at modest speed.

The one at modest speed likes to remain in growth, and currently has 50 watts of LED all to itself, as well as a southwest windowsill with no drafts. The slow one has a southern windowsill and part of a 40 watt system, but may go dormant in November as sunlight keeps fading.

They're a challenge in Pennsylvania...but it can be done. I think of this as the month when fall moves indoors just as I force summer in other ways. My hibiscus are bursting into bloom from the light from the LED systems falling on them. :-)

Great to know. I’ve moved some of them out of the grow light room and to a window. Will probably move the rest if they lose their leaves too or stop growing.

I know what you mean about fall moving indoors. This is the time I realize I have to slow down on watering plants since they’re not growing much. Except for a couple of orchids which are just coming into bloom.