Thanicha Chanchai

I just got oregano seed from the internet and I start sowing them two months ago.
They sprouted into fine seedling in 2 days but after that they became stunted growth.
Two months passed but they only have 1/4 inch height with several tiny leaves.
I tried to move the tray to somewhere with more sun but I am not sure that it will help.
Is it normal for oregano to glow that slowly? or my seedling is too fragile to grow.
Anyway I live in tropical area but now it is winter season and the weather dropped to 80-90 degrees Fahrenheit.
Is this temperature still too warm for oregano?

Thank you for your help.

That's very impressive that you could grow tamarind in cold weather like that. I live in Thailand where tamarind is common tree. It needs full sun and well drain soil. It is very big  tree and I have never heard the idea of growing bonsai  tamarind but you may try it, I want to see the result too. Anyway young tamarind leaves are edible. It tastes slightly sour and we use it in Thai soup.