Pathetic Chillies

[peanut]

Well it would be much colder outside at night than in the greenhouse.

That's really not the case Marb, I have temperature gauges everywhere and the temperature overnight in an unheated greenhouse is about 1c higher if you're lucky. Even with 2 layers of 35gsm fleece and a layer of bubblewrap it only keeps the temperature under all those layers about 2c higher.
Greenhouses don't retain heat, they just get crazily hot when the sun shines on them.

As others have said if your chillies have been kept in an unheated greenhouse that is why they are struggling. It's just been too cold for them.
Mine are still inside until temps are a steady 10c min overnight, which I am hoping will finally be the end of this week!

[Marb67]

Yes but in that case, why have my Toms done ok and other plants sown ?

[ameno]

Tomatoes are more resilient and quicker growing, that's why.
You'd probably have found that they, too, would have done (even) better in warmer nighttime conditions, too.

[peanut]

Exactly as Ameno has said, toms are tougher than chillies.
Plants like Aubergines and chillies are the most heat sensitive, then cucumbers, then tomatoes.
If you want to grow such heat loving plants they need to be kept inside till night time temps are warm enough for them, I'd call that minimum of 10c for toms and cucumbers.
For aubergines and chillies I'd want them to be good strongly growing plants to be left out at that temperature.
I don't think its worth the risk putting them out any sooner, they just really struggle and may not recover in time to produce any fruit.
Warm days and nights is what they like.
Mine have been growing under LED grow lights (cheap ones from Amazon) on the dining room table since February.
I plan to get them into the greenhouse this month.

[ameno]

.Mine have been growing under LED grow lights (cheap ones from Amazon) on the dining room table since February.
I plan to get them into the greenhouse this month.

Personally speaking, I do think that's slight overkill.
Mine got planted out in my greenhorse border 1st May, and are doing very well (large, bushy plants now, and a couple have even set fruit already), despite a couple nights as low as 7c, and my outdoor plants went in almost a week ago now.
I've found the bigger they are, the better they tolerate cooler temperatures. My plants were some 6 inches or more tall, many with flower buds already. At the stage Marb's are at, they do definitely need keeping above 10c no matter what, though.

[peanut]

Personally speaking, I do think that's slight overkill.
Mine got planted out in my greenhorse border 1st May, and are doing very well (large, bushy plants now, and a couple have even set fruit already), despite a couple nights as low as 7c, and my outdoor plants went in almost a week ago now.
I've found the bigger they are, the better they tolerate cooler temperatures. My plants were some 6 inches or more tall, many with flower buds already. At the stage Marb's are at, they do definitely need keeping above 10c no matter what, though.

What's overkill?
It's been way too cold this spring to put mine out, the nights have been down to 3.7c where I am and that was last Friday night!
I'll stick with 10c as my guide.

[Marb67]

Well, still tiny plants, no growth since the last photo DESPITE hot, sunny weather in the greenhouse. This just does not make sense.

[Jungle Jane]

The cold temperature has set them back,I hope they can recover. This is why we don’t leave our plants out in the cold. I don’t know how it doesn’t make sense?? Its warm now but it wasn’t when it mattered,when they were young. We have yearly chats about the temperature for peppers,if you’re unable to have seedlings in the house maybe buy pepper plants instead because they need a constant warm temperature.

[ameno]

Well, still tiny plants, no growth since the last photo DESPITE hot, sunny weather in the greenhouse. This just does not make sense.

Cold weather causes growth to stall. It often takes a week or even two before they even begin growing again.
Also, if they've been in those pots from the start then the compost is likely drained of nutrient by now. You should give them a weekly liquid feed (a general one, not tomato feed), at full strength.

[Marb67]

They have been potted on in new compost and fed with vitax Q4. No matter how cold or slow initially, plants should always catch up when the weather warms up, ie Tomatoes.

[ameno]

They have been potted on in new compost and fed with vitax Q4. No matter how cold or slow initially, plants should always catch up when the weather warms up, ie Tomatoes.

That's a fallacy. They will always start growing again when the whether warms up, but they will not always actually catch up. If they were set back too much then they will never catch up to plants which were actually looked after properly.
Comparing them to tomatoes is also fallacious as tomatoes are far more vigorous and faster growing than peppers.

Also, when were they potted on? How long ago? If it's been more than a month I would still liquid feed them.

[Marb67]

I shall give them some organic liquid chicken manure from pellets steeped in water.

[Bren In Pots]

Marb not sure if you’ve seen the announcement about the vine having a server change and during this time any posts will be lost.

Have a read at this announcement :-

https://www.growfruitandveg.co.uk/gr...te-update-info

[ameno]

I shall give them some organic liquid chicken manure from pellets steeped in water.

I'm not sure that's such a good idea.
For starters, it's hard to properly gauge the dosage of homemade feed. That's fine for more mature plants, but young plants are rather more delicate.
Second, most of the nutrients in poultry manure are not water soluble, so will take a while for the plant to take up. You want something with soluble mineral salts which will be absorbed immediately.

[Marb67]

I'm not sure that's such a good idea.
For starters, it's hard to properly gauge the dosage of homemade feed. That's fine for more mature plants, but young plants are rather more delicate.
Second, most of the nutrients in poultry manure are not water soluble, so will take a while for the plant to take up. You want something with soluble mineral salts which will be absorbed immediately.

The chicken manure has been steeped in water hence making it liquid. I did dilute it.