Maybe nute burn????

Its my first grow. 2 ak48 in coco grow.. 4 days into flowering. Only the new leaves are growing out yellow. is it anything to be concerned about.
 

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Not sure....
Do u use ph meter or ec meter?
I dont think about burn if your top leafs going like that ...
Best wishes
 
Yo I would be concern about it!
What type of coco/nutes yo using?
Possible under feeding of nutes
whats yo ppms? How do yo grow
in coco is it like dirt and yo feed every
other watering?
 
Looks like a def to me,
Where is it on the plant, bottom, top?
Might be Mag or nitrogen, little more info maybe?
 
Leaves look a bit crispy...I'm betting on underwatering and a cal/mag deficiency...If your nutrient solution contains the micro/macro nutrients needed for proper growth then its a PH issue. Coco is more like hydro than it is soil, so you want a PH around 5.8 of your nutrient solution/water. Check your PH and check the ingredients on your nutrients and you should be able to figure it out, its not bad yet :)
 
Did you recently add some bloom ferts with high P/K ratios?? Peace

Yes I just switched to Botanicare Pure Blend Pro Blend (2-3-5). before that I was using Bonnie plants Herb and Vegetable. Which was working really good for the veggie state..only the leaves that are new and on top of the canopy are crispy.
 
Lets get this right please, 4 days ago you changed your lights to 12/12 for flowering??

As such you would not have flowers yet or technically be classed as in flower but you switched to your flower nutes anyway??

Anything else you have done as well?? Flush etc etc Peace
 
Lets get this right please, 4 days ago you changed your lights to 12/12 for flowering??

As such you would not have flowers yet or technically be classed as in flower but you switched to your flower nutes anyway??

Anything else you have done as well?? Flush etc etc Peace
Those where the only changes... I never flushed the cocogrow. should I flush and switch back to the (8-4-4)?
 
Those where the only changes... I never flushed the cocogrow. should I flush and switch back to the (8-4-4)?

A good possibility that you added a little too much P/K too early on in flowering but this is just my guess. I wouldnt flush if it was me id just wait till they need a water and go back to the veg nutes, should balance things up.

That is if thats the problem, seems like it could quite possibly be. Peace
 
A good possibility that you added a little too much P/K too early on in flowering but this is just my guess. I wouldnt flush if it was me id just wait till they need a water and go back to the veg nutes, should balance things up.

That is if thats the problem, seems like it could quite possibly be. Peace
Thanks for the advice. I'm going to switch back to veg nutes.
 
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