Hey ValerieT,
Well sometimes some strains like to start like that.
Autoflowers don't need much nutrients early stage.
When checking on your diary, you didn't use any in the first week but gave some in the second week, which is oke but not really necessary.
Make sure you give ph 6 when giving water or nutrients, 6.5ph is to high in my opinion and only used in flowering stage.
Your younlings want nutrients that benefit more at ph 5.8-6.
It could be a little to much (n)itrogen and what is the distance between your plant and light? Don't put it to close.
I saw the way you give water, the amount seems oke but you should not give her water to close to the stem, you really want to make a ''water circle'' arround the stem, therefor your roots will search for water and make more roots :)
You don't want to overwater the tiny root and make it rot.
Good luck growing :