Any pictures ?
What are the varieties that you are growing ?
When did they sprout ?

Some hot and super hots have a slow growth habit in the early weeks and even months.

SEysonn

Not only lighting can effect the growth but also soil temps.

They sprouted pretty quickly, about a week, 3 weeks ago, I had them on a heater. But I moved them under the grow lights on the windowsill. Temps about 65-70 degrees. Do they need a heat mat?

Also one of them has purple on the cotyledons. A nutrient deficiency doesn't make any sense as the same potting mix grew large brassica transplants.

They are not hot peppers. They are Ace and Biscayne. Fast maturing.

This morning I saw the growth on some of them moved a long a little...

What are your night time temps radiating through the window?

I had to move some overwinter plants from a window because the temps were a bit to cold to just leave them on the sill.

The window is pretty good, I don't think there are any major drafts, and there is a radiator nearby. If anything it gets pretty hot at night there.. but I have no way to know for sure. No way it drops into the 50's though..

Some are doing a bit better, some not so much. I will post a pic when I can. Thankfully still a good 6 weeks to planting out.

What's warm enough for you may not be hot enough for the plants (roots). Plants from a nursery are sold in early spring, making one think that it's time for those plants to grow. But they were growing in some green house or temp-controlled building. Instead, once we get them into our yards, they just seem to sit there for weeks. While they may not be growing up top, they are hopefully growing a better root system.

However, as the growing season continues, there are many factors that will influence the plant's size and produce that it develops. I've had underdeveloped plants before, and I've also had plants that never got larger than about 18" but they kept producing throughout the year. I've also had pepper plants going to 3 feet tall but the peppers they kept producing, while numerous, were small and stunted. Good enough to chop up and eat but not an impressive harvest as far as thinking about the pepper sizes.

There are many reasons plants will slow down or have stunted growth. Too much watering, soil temps (like pursl) stated, Nitrogen deficiency, to name a few. Also if the plants have flowers pinch them off so the plant will focus on new growth. Another thing I've done is to trim some of the lower larger leaves. While I did it for ease of watering and to make sure leaves didn't overlap other plants as much, it helped them grow up a little.

They are catching up. Everyone is out in the hot sun today.

hi,

I had a terrible experience with my Chilliplant indoors, i was looking after 6 of them, but hoping that one day i can see the chillies..I dont think i am impatient, because i waited for >6months. Okies, my lessons (1) Chilli plant is not easy to grow indoors (when i say that it all depends on the location where you live in this globe) (ii) the most important thing for chilliplant growth is a stabbility in temp and humidity condition and that is rather difficult indoors (bec i tried to move my plant outside for sunlight, then move inside during night period etc etc). (iii) the amount of water they need, is something i couldnt estimate precisely, though i tried putting more water for some, and less water for some others. Overall it grows pretty big , shows flowers several times, but finally it didnt give me a single chilli and the recent one even started shedding the leaves and so i just throw it off...Now towards a new attempt. Sorry if i discouraged anyone over here. I was really enthusiastic about this and wanted to see some progress, but all in vain now!!

They grew! :)

I don't know when to transplant them. Last year my peppers were all stunted. I had transplanted them too early and they endured a couple weeks of lows in the 40s. Then I burned them with fertilizer (at recommended strength at that... I will never give my peppers chemical ferts again unless there is a need). Plus it rained like every other day for months, and they were totally rootbound Bonnie's in peat pots. I didn't get a single edible pepper except the jalapeños.

Temps are pretty unseasonably warm right now, 80s/50s, but the possibility of 40s exists until June. I do have a harvestguard row cover and have my eggplants which got too big to keep under my lights indoors out under it.. hopefully they will be ok. They are a little more risilient than the peppers. It may have hit 49 last night.

Any thoughts of when to plant them?

I potted these up into Solo cups, planted deeper as some were leggy and falling over, and they grew anventicious roots from the woody stem. Very surprising. (They are Ace and Biscayne sweet peppers )

Considering how slow peppers grow, especially in my climate, I'd be very nervous to do that..... Maybe I will try it on a couple plants as an experiment. They will be planted closely also so tall plants is better than wide I am thinking.

I'm 6b Taxachusetts so I know how slow they grow. And yes topping now will "bush" 'em out!

I will try it on a couple plants as an experiment... makes me very nervous :)

Doing so would leave me pretty much nothing... 2 lower leaves.

I saw today they all are growing little flower buds. I assume I should pinch these all off? Kind of hard to get to them. Maybe another argument for topping...

I'm not going to top them. I have 9 plants I want to squeeze in to 8 feet of row, so I want them to grow tall rather than wide. Maybe I will do just one as an experiment.