First CoCo grow dying fast nuterient burn or light burn?

Been so helpful in the past and i've read what i can but if somebody has a moment please take a look and see what u think of these, they were donated to me after losing their old home, soon as i got my hands on em about a week in they are now turning yellow crisping, then brown and dying to dropping off completely from the bottom going up, it's all in Coco and perlite, i've only ever used soil so not sure what im doing nute wise maybe i've burnt them?
Is soil nutes dutch pro a + b okay to use?
Maybe they are lacking calcium?
I ph the soil and it comes back as 6.5 ish with a cheapy ph and moisture meter.

I am using 2 600w hps.


Sorry for hps being on but had no other light by my side!

Any advice would be really appreciated !!! Thanks

Budswiser97 said:

Been so helpful in the past and i've read what i can but if somebody has a moment please take a look and see what u think of these, they were donated to me after losing their old home, soon as i got my hands on em about a week in they are now turning yellow crisping, then brown and dying to dropping off completely from the bottom going up, it's all in Coco and perlite, i've only ever used soil so not sure what im doing nute wise maybe i've burnt them?
Is soil nutes dutch pro a + b okay to use?
Maybe they are lacking calcium?
I ph the soil and it comes back as 6.5 ish with a cheapy ph and moisture meter.

I am using 2 600w hps.


Sorry for hps being on but had no other light by my side!

Any advice would be really appreciated !!! Thanks

Click to expand...

Had an issue like this before.firstly I trimmed off the fan leaves that looked unhealthy and burnt I flushed the nutrients with PH’d water for 3-5 days to get rid of the excess nutes then gave them their regular feedings after a week they began looking alive and healthy again.

Ps : them cheap Ph meters really are crap I bought one of them off amazon for £10 even after calibrating with PH buffer 7 it read my nutes mixed at PH 6.2-6.5 so I thought it was okay . Only after a week of my plants looking like they wanted to pass out did I spend £35 on am Essentials pro which told me my PH mix was 5.0!!

hei bro! Iltry to go with leds my brother , im using 600 wats led and you cant burn the plant , I can baisicaly touch my lights without burning myself .
I saw a lot of guys with the same problems as yours they were using hps too
Im baisicaly a newbie , never fucked up a plant with led lights
Cheers!

Difficult to tell with those pics.
But been coco and not knowing what they were given before you had them or how strong of feed the likely hood is salt build up.

If you have an ec pen you could check the run off when you water, safe bet would be to flush them with 5-10 times the volume of the pot and then refeed with the correct dose of nutrients based on the dutch pro grow chart.
Make sure you set the ph between 5.8-6.2 going in.

If your not using coco specific dutch pro then get a bottle of cal/mag.

dazzlingmercurial said:

hei bro! Iltry to go with leds my brother , im using 600 wats led and you cant burn the plant , I can baisicaly touch my lights without burning myself .
I saw a lot of guys with the same problems as yours they were using hps too
Im baisicaly a newbie , never fucked up a plant with led lights
Cheers!

Click to expand...

You must be running a lot of bulbs to be hitting 600w!!
You want to take those globe covers off them mate.

Right so think im gonna transplant to soil ? Will that be possible by now or what do you think? If not then flushing will have to be what im going to do and invrst in a decent ph pen !!

Cheers guys