First time grower here, looking for some advice on a problem that has occurred.
I am growing 1 northern light auto plant under a Mars ts600 50cm above canopy.
I have used bio-bizz all mix for soil base. The plant has not been transplanted.
I decided after 5 weeks of no nutrients it was time to add a small amount, precisely 1ml of bio-bizz grow in 1L of water ever since then the bottom leaves have turned yellow/brown and look as though they are dying.
My question is, is this nutrient burn or something else? No problems prior to this.