Can you help me diagnose this?

[Dmolisha]

Not sure if it’s overwater, nutrient burn, mag deficiency or what?
2 weeks
Strain : CBD Yummy Fem
It’s grown in cocomix
Fed 1ml to 1ltr biobizz grow, in tap water that is left to sit for a few days, it’s also hard (calc/mag) water so ph is lowered to 6.5 but no r.o or demineralization.
I give it about 1/2 cup of feed/water per day.

 

[Mark Gordan Smith]

Welcome to the board.
I cannot give a point of view but I know a few who can.....
however it would help if you gave some info like how have you been watering? what is the seed, have you and if so what nutes have you given? etc-etc.

 

[Dmolisha]

M

Welcome to the board.
I cannot give a point of view but I know a few who can.....
however it would help if you gave some info like how have you been watering? what is the seed, have you and if so what nutes have you given? etc-etc.

thx I added that in.

 

[Mark Gordan Smith]

That should help now. Lets get you up to the top again for second shot at this.

 

[Barney86]

I'll be back on in an hour if it's not sorted by then mate. Just commenting so I remember lol.

 

[Emilya Green]

since you are in a soilless mix, adjusting your pH to 6.5 is not appropriate. Adjust down to 5.8 from now on and the deficiency you are now seeing should stop getting worse. Right now it looks like your plants are not getting ANY nutrition.

 

[Barney86]

Yeah buddy Emily is right about the pH.
I wouldn't expect that bad a result from it so soon though. Only posted in my journal yesterday that I'd been feeding my seedlings at 6.5 for a whole month and only 1 of them got a little stressed from it. They're much bigger than her too. That was in rockwools which has the same properties as Coco in that they have no nutrient value. So 6.5 doesn't instantly look like the direct culprit to me. It could be tbh but its best to cover all bases.
You say your in Coco mix. What exactly is it? Is there anything else in it? Any nutes or that?

 

[Barney86]

You checked the pH of the run off water aswell mate? It's not a very accurate way to do it but if it's higher than 6.5 then can garuntee the pot is even higher than that.
If it's just normal Coco then you should be feeding to run off every day. Otherwise nutes build up in the pot and get stronger. That in turn can fuck with the pH amongst other things.
Get yourself a ppm meter too buddy. The cheap ones on Amazon are alright. Mine cost a tenner and still sweet after 3 years. The cheap pH meters are garbage though. At least £30-£40 for a reliable one of those.
Can check how accurate it is with bottled water. Most big brands have the pH written on the bottle

 

[Barney86]

@Dmolisha flick half way up to the post with the 6 plants mate and you'll see what I mean. 6.5 shouldn't do that much damage so soon. I only got a little stress on 1 plant after a month of it

 

[Dmolisha]

Thanks for the reply!
It is a coco-seedling mix with some micronutrients added. I thought if I keep the biobizz levels low initially it shouldn’t hurt to give it a boost when watering! Then I thought I might have burnt them and or locked them up. I flushed them and slowed watering but then started worrying I overwatered and maybe that’s suffocating them. Whatever I’ve done it’s not working to well! New leaves come in ok, but within a day or so they all repeat the yellowing and dying tips routine. I’ll do some more testing of ph in drainage and see where it’s at. Thx again✌

 

[Dmolisha]

You checked the pH of the run off water aswell mate? It's not a very accurate way to do it but if it's higher than 6.5 then can garuntee the pot is even higher than that.
If it's just normal Coco then you should be feeding to run off every day. Otherwise nutes build up in the pot and get stronger. That in turn can fuck with the pH amongst other things.
Get yourself a ppm meter too buddy. The cheap ones on Amazon are alright. Mine cost a tenner and still sweet after 3 years. The cheap pH meters are garbage though. At least £30-£40 for a reliable one of those.
Can check how accurate it is with bottled water. Most big brands have the pH written on the bottle

 

[Dmolisha]

Thanks for the tips! Especially about the ppm meter and bottle water trick! Will get onto that ASAP!

 

[Dmolisha]

Hi all, I adjusted my ph and got a ppm meter it sitting around 850ppm with 5.8ph
The water is pretty hard to start out but I think the plants are doing better. This one however is not responding as well, any thoughts?

 

[Dmolisha]

This one has really bounced back!

 

[Dmolisha]

I also moved them out of the coco into pellets with bubblers. The roots sit in airated nutrient solution and also get drippers from the top. I’m feeling much more confident with this setup. ✌

 

[Dmolisha]

have to start flowering so I hope they’re good enough now for a small supply.