Deficiency or Lockout? Help needed...

[R_HIDIA]

Problem: leaves at the top of plants seem to be be getting wayyy too light green/yellowing too soon. I’m on day 51

Medium/grow method: promix hp

Feed: and supplements used: GH CaliMagic 2ml/L, AN Sensi Bloom 2ml/L, Voodoo juice, Bud Candy, Big Bud all at 1ml/L

water source: 5 stage filtered R/O

Strain/age: Mephisto Sour Crack day 51

light used: 55 watt autocob x3

Climate: was steady at 24C and 50% RH, however since I finally got my fan and filter running the other day things are now a little colder than I’d like 20-21C and 48-49RH

Additional info: I know I was guilty of over feeding them at times in the past but never really saw much other than a little nute burn or slight leaf twisting. Hopefully whatever the issue is, it’s something that can be amended and overcome. My thanks in advance for any and all input.

 

[Mañ'O'Green]

That might be light burn? what kind of lights are you running and what is the height?

 

[STILLSMOKIN]

I second light burn 3 55w cobs on that little girl is too much. Leaves are twisting Anne trying to get away from light

 

[R_HIDIA]

I second light burn 3 55w cobs on that little girl is too much. Leaves are twisting Anne trying to get away from light

It’s 3 autocobs for three plants. Autocobs are 23 inches above the plants

 

[STILLSMOKIN]

Yeah im running 110v 50w cobs and mine are 40inches and i believe most are running 36''

 

[STILLSMOKIN]

Not familiar with the strain but some drop leaves on there own

 

[namvet25]

Are you ph'ing your water?Looks like she could use some nitrogen or veg nutes.

 

[R_HIDIA]

Are you ph'ing your water?Looks like she could use some nitrogen or veg nutes.

Thanks for chiming in. I’m not ph’ing my water but am using the AN ph perfect line. I too was wondering if they might nitrogen, but my lack of experience made me question if that might be detrimental to the plants development since I’m in flowering. If it is not something to be concerned with I’m thinking I might give some veg nutes when I water later today? If I do, should I just give them veg only nutes or add veg nutes to what I was planning on feeding them? Thanks again for taking the time to respond

 

[R_HIDIA]

Yeah im running 110v 50w cobs and mine are 40inches and i believe most are running 36''

Earlier in veg I was keeping such distances, however from what most seem to be doing with these autocobs and what I’ve seen anecdotally in the cobshop.net forum most in flower seem to be 21-26 inches above. I really do appreciate you taking the time to help me out. Hopefully with help from members like yourself and the main guys in this sub forum like namvet and waira this issue will be just be a small bump in the road that stays in my rear view mirror for the rest of the journey.

 

[STILLSMOKIN]

With more inspection of plant im almost suspect excess nutes. Just looked at what and how much you are feeding. Do you have a ppm meter? How big is pot and plant. Just by looking im guessing no more than 24'' from top of medium. You are feeding enough for a 6ft plant. I would wait and let others like waira chime in. My thoughts would be to ph water and flush.