Growing tomato seeds inside
I planted tomato seeds...germinated covered one week only one plant started grow...has grown to three inches with leaf at the top...now it has fallen to the soil...what next is it dying
the seedling may need more sunlight.
If that is not possible for you, a grow light will help.
Seedlings also need darkness in order to grow.
So, at night keep the lights turned off (if you don't already do that).