Barney's Blue Cheese light green color leaves and slow growth problem

[Weedarast]

Hi Everyone,

This is one of my first grows.

Seed: Barneys Blue Cheese auto flower.
Medium: Soil + Perlite.
Time since germination: 5 weeks
Nutrient: Used 2 liters of Greenhouse Superfeeding Grow with 0.750 gr nutrient per liter of water.
Light: Yellow 80W and Daylight LED 100W 20x4 hrs

The leaves seem to me very light green going to yellow. Please advise what to do? Is this nutrient deficit?

 

[Beleaf]

Still having issues?

 

[improvise]

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