HELP! What's wrong with my plants!?!?!

[just a medicator]

They're a little over six weeks into flower. I'm not sure if it's a nitrogen deficiency because it didn't start on the lower fan leaves and they didn't start out with just yellowing, they started out browning a little on the leaves and then eventually turned yellow.
here's some pictures

 

[XoraKJoken]

Hmmm, the yellowing is in tow for nitrogen, however it could be other factors. Are you keeping your plants to wet? They look a little over watered?

 

[blackrider420]

First I would have to agree. The plants do look a little bit over watered. Second I would be wandering if you are PH ing the water. To me it looks like it is a calcium magnesium deficiency and some over watering. I would let them dry almost completely before watering again. PH your water and if decide its a cal/mag deficiency give them a shot of cal/mag nutrient.

 

[just a medicator]

First I would have to agree. The plants do look a little bit over watered. Second I would be wandering if you are PH ing the water. To me it looks like it is a calcium magnesium deficiency and some over watering. I would let them dry almost completely before watering again. PH your water and if decide its a cal/mag deficiency give them a shot of cal/mag nutrient.

My Ph meter broke, so I've been using the Ph drops to test and I usually get it in the 6.5 color ph area. I use Cal/mag every watering. Maybe it's overwatering I guess, would it be I'm watering them with too much water at a time or too frequently, so the soil is constantly moist? I usually water em and let the run off sit to absorb more for like 10-15 minutes then I get rid of what's left in the treys

 

[Budsworth]

They look like there are drowning.

 

[Jimdamick]

My Ph meter broke, so I've been using the Ph drops to test and I usually get it in the 6.5 color ph area. I use Cal/mag every watering. Maybe it's overwatering I guess, would it be I'm watering them with too much water at a time or too frequently, so the soil is constantly moist? I usually water em and let the run off sit to absorb more for like 10-15 minutes then I get rid of what's left in the treys

I use 3 gallon pots and I found that 3 days between watering in soil with 20% perlite is good for me. I pick up the pot and if it very light I add water. You would be surprised at how much moisture the soil will hold even when it feels dry. Remember, two of the main reasons for plant failure are overwatering and over feeding. Blow a fan across the soil to help it to dry out. That will help.

 

[blackrider420]

I think that you are watering to frequent. I would start with that. I have 6 plants that under a 400w in 3 gallon pots i only have to water about once a week. I would cut back on the watering. Let your soil get almost all the way dry then water again see if that helps you should post more pics if they seem like it is getting worse