Could use more light, but what could be happening is it’s getting ready to bloom. I have one now that’s starting to bloom. They start getting really tall and it’s the time of year for them to flower. What does the center look like?

In case you didn’t know they’re monocarpic. Which means they bloom once and die.

I can tell by your other Kalanchoes that they could use more light. The leaves should look like clams and will get red when recieving lots of sun. Could you put outside?

Daisy

I wonder how far are the lights from plant? Also, what lights are you using?

kara, I cant put my plants outside unfortunately. I live in Minnesota and it is far too cold.

Rina, it's maybe 2.5-3 feet from the light. I have attached a picture of the light I use.

You really need something stronger. To deal with taller plants some use halide lights. I just don't grow those plants.

Daisy

I also use lights - most of my plants overwinter in the basement. They are 12hrs on-12hrs off. I have mostly CFL bulbs (min.23W and some higher) and also fluorescet tubes.

IMO, your lights are way too far from plants to be of any benefit. I would suggest gradually lowering them, until they are min. 10" - preferably less - away from plants.

Here is photo of some of my succulents with lightbulbs visible; they are approx. 3 - 4.5" away (it is possible that some shortest plants are further away, but not over 5.5")

ETA: how far from the window is the shelve/plants? what exposre is it? is the window unobstructed?

I have Kalanchoe luciae that bloomed this Summer; stem is quite long and got bent. Flowers lasted for quite some time, I finally cut them off. There are many offsets, some grew from the base, many along the flowering stalk/stem, I have to yet pot them up. Flowering stalk will eventually all dry up. Most leaves have reddish margins - sign of good sunlight plant was receiving outdoors:

Rina,

The plants are right up against the window, but I know it's not the best window for light. I will definitely have to get a stronger light. I will get more lights too.

Dasiy, I use mostly LED. Can't make out the kelvin levels. Mine are 5000k which they call bright light. 6500k or higher is best but hard to get.

I agree with Rina, Light should be closer.

I don't agree about monocarpic. Mine bloom with out dying.

Stush

From what I read, K. luciae is a monocarpic plant. Which one do you have? I had one before and it died after blooming (could have been my 'care' :). One that just bloomed has so many offsets - many growing from the base - I just wonder if it is your original plant that reblooms and doesn't die, or perhaps a new offset? Do you separate offsets? What do you do with flower stalk after blooms are spent? - do you cut it off or leave?

I do not know about K. thyrsiflora (apparently much rarer). I have also K.l. 'Fantastic' but it didn't bloom.

(I think Crenda - I didn't see her posting for a while - grows many outside; I wonder if she will chime in if she sees this post. mfyss also grows many kalanchoes, but I am not sure if he grows K. luciae.)

Maybe I spoke out of place but I owned a cheap one sold in groceries stores in spring and it kept growing and got kinda big again before it bloomed again. They I gave it away. Just got another one as a gift. Had yellow flowers.

Stush

That seems to be Kalanchoe blossfeldiana, usually lots of them sold this time of year. Flowers could be yellow, pink, red, white, single, double...Some blooms look like tiny roses. That one is not monocarpic, and can be grown very easily from leaves or cuttings. I start new plants every now and then, since they can grow big as you said, and quite woody.

That’s Kalanchoe blossfeldiana and those will bloom over and over again, but the one in the Op’s post is K. luciae like Rina already mentioned:). Mine is in the early stages of blooming, but I will take pics as it grows. They get super tall, probably close to a meter. Heck maybe even taller;).

edit: I was writing as Rina posted.

My apologies for false statement. Just knew mine didn't seem to die back. Just like Yucca. some die after flowering and some grow into trees.

Thank You Rina and Kara.

Sorry Daisy for going a little off topic.

I have another Kalanchoe nik-named mother of thousands and it is not a lie. Grows like weeds in all my other pots. I keep pulling out and throwing away. Has the tiny new plants all around the leaves. Any piece grows a new plant.

Stush

That is a 'forever' plant, haha. Once you get t, it seems to pop up in most unexpected places and most unexpected times. I left one I had outside and it froze - that was about 3-4 yrs ago and I still get occasional seedlings growing. There are at least 5 or more now, in different pots. It has nice blooms thou! Here are just 2:, growing in pots with jades:

That's nicer looking than mine. Mine has mostly rounder leaves and mostly green. What flowers? I know sooner or later but never seen any on mine. Got picture of larger one? I'll have to take one of mine that I left in one of my pots.

Stush

Not right now (I threw some biger away earlier this year); but here is photo of original plant when it bloomed:

I checked the date, and it was Feb. 2017 - so I disposed of it later than I thought (not 3-4 yrs ago as I said previously - or maybe I had another one before. Do not remember...)

ETA: here is photo when more buds opened, and also a close-up of one of the leaves with all the 'babies' on margins:

Stush

I just found bigger one, growing in a pot with K. beharensis 'Fang':

I also appologize to Daisy for going off topic...

Thanks for the info and photos. Took some of mine this morning.

I would say Kara is right on ID Kalanchoe laetivirens. Thank God winter kills them or my whole yard would have them.

These are young about 3 months or so old. I pulled some out before bring the post in.