It may be too dry as the plants are directly next to a radiator that is on 24/7, however the temperature fluctuates between 29 and 21 when the CFL above them is on and off.
I've checked the leaves, there's nothing apart from a little oedema.
I've stuck with mostly pretty purple types cos the misus is getting annoyed with sprawling greenery so adding some vibrant colours may settle her down.
I'm also using the wet paper towel method at the moment to see how that will go instead of using soil to germinate them
Great to see you're persevering at the whole chilli 'thang'!
I wonder if the lad at www.fatalii.com wouldn't be able to give you more local help? Particularly with soil issues? He grows forests of peppers in Finland so it's certainly possible...
Cheers Huntsman. Fatalii is local(ish) he's in southern Finland but not quite the Helsinki area. He actually sells his chilis to thethe national supermarkets here. I've purchased many of his nagas.