[Plant-biology] Re:Tomato seed question, Plantbiolist

[B. P. TBC]

Dear Sir Williams!

Thank you for your help!
> This specimen has the weak, leggy look of a plant whose light 
requirements
> are not being met. Tomatoes can take as much sun as you can give 
them, and
> do best in 8hrs+ of direct overhead sun.

Normally it is placed on my southern windows, it get direct sunlight 
from 7 o'clock to 17 o'clock, but after I exchanged its soil, and I 
placed it to direct light, it withered. I moved temporary it to my 
eastern window. 

> You have not indicated your location or latitude - there may  not be 
enough
> sun to grow proper tomatoes at this time in your area.

My location is Hungary, Central Europe.
 
> You also may be low on nutrients.

What kind of nutrients must I give? Yet it's soil is general potting 
soil, which contains peat and sand, and it's PH is between 6 and 7.

Many thanks:
P.