A question from a fellow grower:
I’m writing this letter because few days ago i found a bad surprise on my plant’s leaves.
Nobody is able to understand which could be the reason.
I describe you my growbox details.
120 x 120
600 watt hps
Unfortunatly i coudn’t acheve a taller humidity during my veg period that i switched to bloom just yesterday.
I guess that the problem could be caused by the fact that i’ve switched from MH to HPS without moving the bulb further than before.
And so i guessed it could be a burning problem, added to the clime too dry.