Need help identifying problem leaves yellow an falling off

[santee420]

Can anyone help identify this problem Have searched an searched for answer but not sure of problem possible root bound maybee lack of nitrogen but these plants have been grown under 2 1000 watt hid (first 6 weeks metal halide after 8 week switched to high pressure sodium and turned to 12/ 12 lights on lights off schedule. Currently in week 5 of flower phase. Overall leaves on several plants more yellow than green and many falling off. Is there some nutrient i could add that may help. Any advise would be greatly appreciated.

 

[Steelheader3430]

Nitrogen def. I think. I'm in week 5 of flower too. View attachment 2849767 I wouldn't think transplanting would be a good idea at this point just deal with the N and you'll be happy. Possible mag def. too. Are you giving them any nutes?

 

[chairroller]

Can anyone help identify this problem Have searched an searched for answer but not sure of problem possible root bound maybee lack of nitrogen but these plants have been grown under 2 1000 watt hid (first 6 weeks metal halide after 8 week switched to high pressure sodium and turned to 12/ 12 lights on lights off schedule. Currently in week 5 of flower phase. Overall leaves on several plants more yellow than green and many falling off. Is there some nutrient i could add that may help. Any advise would be greatly appreciated.View attachment 2849716View attachment 2849717View attachment 2849718View attachment 2849719View attachment 2849726View attachment 2849720

For the last time, if it's flowering time don't add any nitrogen ! At this level the plant produces nitrogen itself so you go for nutrients like 5-15-15 !
I'll wait for your response ! Forget about yellow leaves if it's flowering time !!

 

[AimAim]

Keep your N level up with a balanced fert. Cutting back on N during flowering will result in just what you are seeing. Keep them fed and green and growing till you harvest.

 

[blazedaway91]

What size pots do you have? The plants will naturally start shedding leaves during the final stages of flowering, as the plant believes it is autumn, but your plants don't look nearly done. It could be the plant has outgrown the pots. It happened to me before, I reported, and within days it was flourishing.

 

[Po boy]

many growers wind up with plants like yours because they depend on blooming food only during the flowering stage, which is generally low in nitrogen. GL