Frida (Green Crack)

Hello, readers! Actually, I cannot belive, that it's already 5th week. She looks sooooo underdeveloped. Even though she not weak in the way of nutrience balance or temperatures. Just doesn't grow... I wanted to abord her, to be honest. I think the reason for that is her root system. Because only by the end of this week, I saw a small root coming out of the cup. I should've happened 3 weeks ago. I suspect peat pellets, I don't remember me using it in hydro, i usually try to make my own solution with coco and perlite.