Thanks all for your replies.
When did I sow them? er, I wished I kept that record. I think it was the last week of february or the first week of march. It's my first year of gardening and I only started my gardening diary last Saturday
I agree on that pots are too small for them. They would have been planted in greenhouse already if weather permitted. Two weeks ago I placed 3 plants into greenhouse just to see if how they would coupe with it. Another 3 left in the house are the 'main crop' and also the insurance if the ones in the greenhouse fail.
So, the plan of action is: greenhouse plants going into the soil today. Indoor plants have to wait till tomorrow until I get some bigger pots!
This is the best of indoors specimens:
I also will keep an eye for this lime stuff. AFAIR the leaves' edges were yellowing since the very beginning. So it might be the soil issue too.