Led coco autofloower leaf yellowing, brown crisp

[TRiGz]

Hey I have a auto in coco in 3 weeks of veg getting yellow leafs can u help

 

[Muddy]

We probably can if you give us more information. We'll need to know the pH of your nutrient solution, the pH of your run off, the water that comes out the bottom of the pot after your feed. We'll also need to know what you are feeding and at what strength. Also your temperature and relative humidity. We'll also need to see some pictures, both close ups and whole plant, taken in natural light or with flash so we can see the true color of the leaves.

 

[TRiGz]

Feeding then canna start 5 mil in 5 litres same with rizotonic and canna a b ph at 6 not checked wot it coming out

 

[TRiGz]

 

[TRiGz]

Help me out in coco and these are the nuts useing on 18/6 led 300 wat

 

[Muddy]

Judging from the pictures it looks like a lack of magnesium and possibly some P and K deficiency as well, which would suggests your pH is off and causing those nutrients to be locked out and unavailable to the plant. In coco your ideal pH is 5.8. Without knowing the pH of your run off it's impossible to tell for sure if that's the case. You'll need to feed them and capture and test the run off so we can narrow it down.

 

[TRiGz]

Done run out and ph was 4

 

[Muddy]

Feeding at a pH of 6 and getting run off of 4 indicates that your actual pH is around 5, which is too low. I'm not a coco grower and not sure of the best way to raise the pH in coco. Let me see if I can get someone more familiar with coco to drop by and give you some more specific advice.

 

[Justinsane]

Mix up nutes at an ec of 0.7-0.8 and raise your ph to 6.2 and flush with double the amount of pot. The feed them with an ec of 1.0 at max at this stage.... with an PH of 6.0


edit: Never flush or give your plants just water in coco...that fucks up your buffer...always water with nutes....but always check both ec and ph

and if I was you I would go with just canna coco A and B and some cannazym right now...get rid of the rest for now...you dont need them...I prommise you that

 

[GCase]

TRiGz

If you have time go to the Canna site. They have sites for Aussie, UK, US etc.

One thing about coco is that as Canna states a run off reading is misleading in coco.

In coco PH ideally should never be an issue. Because we can control PH and EC/PPM. Like Justinsane stated coco is buffered right out of the bag.

Canna discusses how to pre water pots (think it is 5.5) to get PH set--though it is buffered already.

I never use more than about 1/2 to 2/3 minimum dose of all nutes at first feeding. In addition, after the pre watering with a dry out period I run a mild A & B (2 ml per gallon) to provide nutes for up to two weeks.

All in all looks like some early burn.

I would water with 6.0 including some cal/mag or epsom and let it dry out. Then in two days (should be fairly dry) a very light feeding.

Takes some experimentation. I do recommend the official site to get rolling. Above is just my method and may vary from Canna.

Cheers