Super Lemon Haze Auto

[Edea_barby]

Hi, I'm a newbie and I need some suggestion: this is my third week from seeding and I would like to know if my plant is ready for the nutes. The soil is Flora Garden and I added some coco soil. I bought 17% N, 17%P and 16%K they are different bottles, how can I get how much of each of them should I use? Could you please help me for that or should I buy other types of nutrients? Since now PH and temperature and humidity are normal