Leaf tip burn or deficiency?

[benjones]

Evening all .
A few plants of mine have leaf burn on the tips and edges of mainly the fan leaves . Is this a deficiency or is it over fed that has caused it ?

 

[growsince79]

Hard to know without more info. How much / what are you feeding? How often? What size pots? How much light?

 

[benjones]

Thanks for replying @growsince79
I use mega crop for nutrients
0.2 tap water
0.1/0.2 cal mag
1.2 nutrients
0.1/0.2 Epsom salts

EC 1.6
5 gallon pots feeding once every 2 days

Light is on 80% , 10 inches from the top , mars hydro fce 4800 , lux meter reads between 65000 to 55000 , but Photone app say 880 ppfd , but I have not had it calibrated and I am using paper that may be thinner than 80gsm so I can’t be sure how accurate the app is on my phone

 

[2Bad]

What medium? i'm leaning towards nutrient burn

 

[growsince79]

What medium? i'm leaning towards nutrient burn

Perfect next question. I'm leaning towards root problem due to incorrect watering.

 

[2Bad]

Perfect next question. I'm leaning towards root problem due to incorrect watering.

You think too much watering? Or underwatering because it's probably coco?

 

[growsince79]

You think too much watering? Or underwatering because it's probably coco?

maybe so. Too much light too, until it gets healthy.

 

[benjones]

Thanks very much @growsince79 and @2Bad

It’s coco .

I will have a look today and try and get more information.

There are about 4 plants that dry out quicker than the others as they are nearest the fans and some are shorter so not as close to the light . I will see how this tallies

 

[2Bad]

yeah for coco most people do low EC , and they feed multiple times a day I’d say lower your EC for sure

Edit one thing I like to do is give phd water every other watering

 

[benjones]

Thanks @2Bad
I will lower the EC on the next few feeds . I usually aim for 1.6-1.7 , I have noticed the run off has been coming out around 1.8-1.9 the last few feeds