7 weeks flowering Whats wrong please help.

So this happened over night and its only on the top buds and not the lower leafs

From the picture and the limited info avaible it looks like an overdose of nutes, someone may correct me but due to the tips being 'burnt' that what it looks like to me, what you medium and whats your dosing?
Also i dont think it is a def as those tips are brown, also as you are late in flower it could be the plant naturally coming to the end of its life, espically if you are using a hps light as yellowing late in flower is normal.

Also may i ask strain? And just a thought its not light burn??is it? Looks tasty though, sorry if im no help.. Take it easy.

Ph 6.8, soil, all organics, and the tips I think are burn but I just lowered my nutes and what I'm concerned on is the yellowing around the edges.

Blueberry Gum and thanks.

The bottom fans are yellowing out nicely due to it being that stage but there is a gap of lush shiny green leaves then these young leafs yellowing around the edges.

G13's BBG???

blueberry is infamous for being extremely nutrient sensitive so could just be a nute burn...if its all organic though its pretty tough to burn if your growing in true organics....would love to see more pics of your BBG i have 2 of them going right now. one is in DWC the other is in soil...

Hummm,, well thats all bang on as you know , so maybe it is the stage and not a response to your input.....or the light, still im sure it will smoke up nice when you chop her down.
Im kinda just spitballing here but it couldnt be an iron def. could it..?
iron def are common when pH is above 6.5, and may appear during stressful time and disappear by themselves, i dont know how, young leaves are unable to draw immoble iron from older ones even though it is present in the soil, but then iron def start at the leaf apex and not the tip,,, so maybe its not that,
zinc maybe, as younger leaves start show signs first, leaf tips and later margins discolor and burn, which kinda look like your pic, also leaf tips discolor and turn dark and die back, but then since your ph is below 7 it probly isnt that,.... Sorry im not really helping, i just went and had a read of my book to get that info....

Yea check my sig bro and tell me what you think my last update is on page 16 and I see you eveywhere Matt +REP.

Bro or Gal you help more than you know Bunny thank you you should stop by my thread and take a look.

Well thanks and i will do.. Take it easy.

bunnyface said:

From the picture and the limited info avaible it looks like an overdose of nutes, someone may correct me but due to the tips being 'burnt' that what it looks like to me, what you medium and whats your dosing?
Also i dont think it is a def as those tips are brown, also as you are late in flower it could be the plant naturally coming to the end of its life, espically if you are using a hps light as yellowing late in flower is normal.

Click to expand...

Why would HPS lighting cause yellowing in late flowering? I use HPS lights during Veg and Flowering and I've never had this problem.