Continuing brown leaf issues

[JMystery]

Recently I posted this post, where I said that my 22 day old plant was getting issues with dry lower leaves.

Following the advice I've been watering daily (around 1L) with plenty run-off but still seeing the issue appearing on newer leaves. Plant doctor says either a Boron deficiency (rare), under-watering or conditions are too dry? Moisture is around 40% and being fed daily - how do I fix this before it gets worse. Rest of the plant looks good (images below).

This is the article which I think best describes the issue.

1 Ltr Airpot
70% coco / 30% perline
Spiderfarm 1000 at around 25" on 60% power

 

[go go kid]

you should check your coco ph , you could be locking out trace elements, though not probable i dont think.
try giving her some seaweed solution, its packed with trace elements, got some major nutrients and is a plant tonic too. an all rounder

 

[JMystery]

I've ordered some seaweed solution which I'll try tomorrow and see how that goes. Frustrating as hell - BUT.... no fungus gnats yet, so that's a win!

 

[go go kid]

you can put an extra layer of pure perlite on top of your pot to discourage them

 

[JMystery]

you can put an extra layer of pure perlite on top of your pot to discourage them

Last grow I put about an inch and the little bastards were passing through it like the gate of a fairground attraction. This time I'll be using mosquito bits but so far, no issues. It's also pretty cold outside for fungus gnats. Not many of them about now.

 

[DrKiz]

you can put an extra layer of pure perlite on top of your pot to discourage them

I use 1-2 inches of hydroton, and never get gnats. Wash it off and re-use it next grow.

 

[JMystery]

Ugh - the problem appears to be getting worse. Even brand new leaves are showing some spots of brown now, and middle-tier leaves are looking pretty bad too. I've ordered PH testing stuff and PH up/down in case it's a PH issue (I don't think it is though). Anyone else offer any suggestions? She's only 4 weeks old today. More photos which may help someone identify the problem.



I mean, I recognise that the lower (first) leaves are pretty much dead and the middle ones look to be going the same way and likely won't be repaired, but any advice other than that would be great.

 

[MickFoster]

Ugh - the problem appears to be getting worse. Even brand new leaves are showing some spots of brown now, and middle-tier leaves are looking pretty bad too. I've ordered PH testing stuff and PH up/down in case it's a PH issue (I don't think it is though). Anyone else offer any suggestions? She's only 4 weeks old today. More photos which may help someone identify the problem.

View attachment 4721035 View attachment 4721036 View attachment 4721037 View attachment 4721038 View attachment 4721039

I mean, I recognise that the lower (first) leaves are pretty much dead and the middle ones look to be going the same way and likely won't be repaired, but any advice other than that would be great.

If you haven't been testing and adjusting your pH........that's a problem.
Why would you start a grow without pH testing equipment and pH up and down?
Your pH should be around 6.0 in coco.

 

[JMystery]

If you haven't been testing and adjusting your pH........that's a problem.
Why would you start a grow without pH testing equipment and pH up and down?

Because I didn't know any better. In soil, I didn't have problems with the amount of nutrients I was giving the plant. It did really well without needing to check the PH so my natural assumption was that it would be at least similar in coco. Apparently wrong but I know now. If this one doesn't survive, i'll start over. It is only my second grow.

 

[MickFoster]

You might want to read this link to learn the correct way to grow in coco........www.cocoforcannabis.com. Most people find it helpful.
Good luck.

 

[JMystery]

Thanks man - last night, I decided to rinse out the soil with plain water and feed with PH balanced mix (had to use a few drops of cider vinegar to bring it down). Don't want to be too premature, but this morning she is looking a bit better. Top layer of leaves are totally straight (no drooping tips) and she generally looks more healthy. Will likely be able to tell over the next few days by which time the PH up/down will have arrived.

Thanks for the link - i'll read up on that today.

 

[Lightgreen2k]

Ugh - the problem appears to be getting worse. Even brand new leaves are showing some spots of brown now, and middle-tier leaves are looking pretty bad too. I've ordered PH testing stuff and PH up/down in case it's a PH issue (I don't think it is though). Anyone else offer any suggestions? She's only 4 weeks old today. More photos which may help someone identify the problem.

View attachment 4721035 View attachment 4721036 View attachment 4721037 View attachment 4721038 View attachment 4721039

I mean, I recognise that the lower (first) leaves are pretty much dead and the middle ones look to be going the same way and likely won't be repaired, but any advice other than that would be great.

Can you show the whole plant. I would have cut off the lower leafs.

 

[oill]

Recently I posted this post, where I said that my 22 day old plant was getting issues with dry lower leaves.

Following the advice I've been watering daily (around 1L) with plenty run-off but still seeing the issue appearing on newer leaves. Plant doctor says either a Boron deficiency (rare), under-watering or conditions are too dry? Moisture is around 40% and being fed daily - how do I fix this before it gets worse. Rest of the plant looks good (images below).

This is the article which I think best describes the issue.

1 Ltr Airpot
70% coco / 30% perline
Spiderfarm 1000 at around 25" on 60% power

View attachment 4719712

Are you getting run off from watering every day?

 

[JMystery]

Yes getting plenty run-off but looks like PH was the issue. But I will remove lower leaves which have died completely, just waiting to see how she goes over next few days.