Barneys Blue Mammoth: Yellowing Leaves

[maulwurst]

Hi All,

Strain is: Barneys Farm Blue Mammoth AF

I was wondering whether you could help me out (first time I am doing this)....Light is 150w HPS, they also stand outside sometimes.

PH I have not checked (could that be the problem)?

So far I have not given many nutes, a bit of PK 13/14.

But what should I be giving them? Could it be that I am over-watering them?

They are around 4-5 weeks old.

 

[deadein]

Hi, Im no expert, but it looks to me that they need food. Looks like the leafs have a nitrogen def. I have used a 150w also, I keep mine 6-7 inches away and have a fan blowing on the bulb. When watering, dont over water. Water the plants then dont water again until the pot is really light. Over watering is not good for plants. Water heavy, feel the weight of the pot, and when its really light, water heavy again. I would give this plant a small dose of half strength nutes.