New Grower first time coco , burn or deficiency

[shinjeci]

Problem: nute burn ?

Medium/grow method: coco coir , 5 liter pots

Feed: and supplements used: canna coco A B 1.5 mil/l , cal mag 1mil/l , feeding every day with 500 mil / day , i dont have a ph pen and i dont know the PH of my solution , but my tap water is PH 8

water source: tap water , PH 8

Strain/age: Wedding cheesecake auto , day 45

light used: HPS 400W , 40 cm away from the tops

Climate: 26 C during the day , 21 during night

Additional info: as soon as the plants started to flower , some nute burn or deficiency showed up . feeding is the same as in veg stage

 

[Arthur]

A pH pen is mandatory equipment when running coco.
pH and ppm are your north star when growing this way.

Betting your well out of the 5.8 to 6.2 that coco wants to run at.

 

[Mañ'O'Green]

PH is critical. You need two tools a PH pen for setting your nutrients and a PH probe to test the PH in the root zone. Get a Blue Lab Leap soil probe and meter or an Accurate 8 soil probe or the clone of it. Don't buy cheap ones they just do not work.