Coco and overwatering

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Beezelbuz

Active Member
Ok so I am growing in coco for my second grow. For the first coco grow I followed a technique of frequent fertigation watering three times a day. This worked very well but it was started with larger plants so I think they were able to breathe better.

This grow I was doing the same thing and noticed plants were growing slowly and were showing signs of yellowing and dying leaves of older leaves. Thought originally this was phosphorus def.

Increased phosphorus and the plants seemed to recover a bit so I thought it was solved. Then I started the same with two seedlings after they popped for a few days. Noticed the same issues with seedlings... since there is no way to already have phosphorus def I saw the symptoms more aligned with overwatering.

Stopped watering 2 days ago and plant coco is still extracting drips of water when squeezed between finger.

More scary still my baby seedlings have very yellow veins and one has its first set of leaves starting to yellow and die. How long before this bounces back?! Can they recover?

Please help!!
 

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lusidghost

lusidghost

Well-Known Member
You can definitely overwater coco. Especially seedlings. I start watering once a day once the plants tell me they need it. During my last grow I was using Blumats and overwatered a few flowering plants. It was hard to figure out what was going on because I wasn't in control of the feeding anymore.
 
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Beezelbuz

Active Member
lusidghost said:
You can definitely overwater coco. Especially seedlings. I start watering once a day once the plants tell me they need it. During my last grow I was using Blumats and overwatered a few flowering plants. It was hard to figure out what was going on because I wasn't in control of the feeding anymore.
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Think they will recover? That's the main thing I'm worried about....lessons learned.
 
lusidghost

lusidghost

Well-Known Member
Beezelbuz said:
Think they will recover? That's the main thing I'm worried about....lessons learned.
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I think so. They don't look too far gone. I'm not sure if that's the issue or not, but it couldn't hurt to stop drowning them. If you watch the coco, some of the top layer will start turning a lighter colored brown. That's when you should water it. You don't want it to dry out, but you also don't want it oversaturated. Pick them up when they are freshly watered to get a feel for the difference. Wet is dramatically heavier than dry coco. It will feel almost weightless in comparison.
 
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oill

Well-Known Member
Beezelbuz said:
Ok so I am growing in coco for my second grow. For the first coco grow I followed a technique of frequent fertigation watering three times a day. This worked very well but it was started with larger plants so I think they were able to breathe better.

This grow I was doing the same thing and noticed plants were growing slowly and were showing signs of yellowing and dying leaves of older leaves. Thought originally this was phosphorus def.

Increased phosphorus and the plants seemed to recover a bit so I thought it was solved. Then I started the same with two seedlings after they popped for a few days. Noticed the same issues with seedlings... since there is no way to already have phosphorus def I saw the symptoms more aligned with overwatering.

Stopped watering 2 days ago and plant coco is still extracting drips of water when squeezed between finger.

More scary still my baby seedlings have very yellow veins and one has its first set of leaves starting to yellow and die. How long before this bounces back?! Can they recover?

Please help!!
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These plants should NO sign of overwatering.... let's have it right....

You sir have a nutrient or ph issue. What's your ec and what's your ph from a recently calibrated ph pen?

Willing to bet your ph is too high or your ec is too low.
 
lusidghost

lusidghost

Well-Known Member
oill said:
These plants should NO sign of overwatering.... let's have it right....

You sir have a nutrient or ph issue. What's your ec and what's your ph from a recently calibrated ph pen?

Willing to bet your ph is too high or your ec is too low.
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Lockout can be caused by overwatering. A little seedling can get locked out easily. I usually feed seedlings straight tap water, so I doubt it’s that.
 
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oill

Well-Known Member
Ps... you can't over fertigate in coco. You can fuck shit up by underwatering and nit getting run off
 
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oill

Well-Known Member
lusidghost said:
Lockout can be caused by overwatering. A little seedling can get locked out easily. I usually feed seedlings straight tap water, so I doubt it’s that.
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No... you can't lockout by overwatering in coco you can only lockout by overdose or incorrect ph or underwatering. Underwatering leads to salt buildup which spikes your ec in the medium. You need rum off every day.

Stick to ec1.8 and and ph 5.9 and run off every day.
 
lusidghost

lusidghost

Well-Known Member
oill said:
No... you can't lockout by overwatering in coco you can only lockout by overdose or incorrect ph or underwatering. Underwatering leads to salt buildup which spikes your ec in the medium. You need rum off every day.

Stick to ec1.8 and and ph 5.9 and run off every day.
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So setups with Bluemats need runoff? If you set them to get runoff you would overwater your plants. Mold would form. Problems would arise.
 
Danja-83

Danja-83

Well-Known Member
That second pic looks like it's started to flower with hairs and finished stretch? Looks like something has gone wrong somewhere along the line.
 
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oill

Well-Known Member
Either way... stick to the OPS actual problem. He has overfeed\lockout.

Fix by
Calibrating ph pen
Mix feed to 1.7ec ish
Water till you get run off and plenty of it. You need to correct the root zone.

If you look at the tops of the plants they are yellow and have burned tips. So it's almost certainly overfeeding or salt buildup. Very common when not getting run off with coco.
 
lusidghost

lusidghost

Well-Known Member
I'm not too sure what's going on with the bigger plant. It could very well be a ph issue. My point is you can definitely overwater coco. When you do, you slowly ruin your rootzone. This causes all sorts of problems that are hard to identify. I've seen it happen first hand, from seedlings to full blown flowering plants.
 
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oill

Well-Known Member
lusidghost said:
I'm not too sure what's going on with the bigger plant. It could very well be a ph issue. My point is you can definitely overwater coco. When you do, you slowly ruin your rootzone. This causes all sorts of problems that are hard to identify. I've seen it happen first hand, from seedlings to full blown flowering plants.
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I guess this is why the dtw 20% run off a day run is so drastically unpopular and unherd of and undocumented hahaha.

I'm flooding every day 1 time and they get reasonably dry by the next feed.

www.cocoforcannabis.com

Cannabis Grow Guide - Coco For Cannabis - Science and Practice

Cannabis grow guide: articles, tutorials, DIY projects & more! Dedicated to the science and practice of growing cannabis in coco perlite and other media.
www.cocoforcannabis.com www.cocoforcannabis.com
 
lusidghost

lusidghost

Well-Known Member
oill said:
I guess this is why the dtw 20% run off a day run is so drastically unpopular and unherd of and undocumented hahaha.

I'm flooding every day 1 time and they get reasonably dry by the next feed.

www.cocoforcannabis.com

Cannabis Grow Guide - Coco For Cannabis - Science and Practice

Cannabis grow guide: articles, tutorials, DIY projects & more! Dedicated to the science and practice of growing cannabis in coco perlite and other media.
www.cocoforcannabis.com www.cocoforcannabis.com
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Everyone who thinks they understand coco posts that link. Seedlings can be overwatered. Flowering plants can be overwatered. DWC only works due to the high amounts of oxygen in the water. Too much water will harm a plant.

You water once a day, and your coco is reasonably dry, which causes the EC to rise, causing a need for runoff.
 
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Beezelbuz

Active Member
Sorry guys was at work and this thread exploded. Thanks for the feedback. I have a recently calibrated ph pen and I am watering at 5.8-6.0 and my ec I for the babies was 550 or .5 and for the big girls they are at same ph but ec is 900 or .9

The main reason I think this is not nute burn is the yellowing is not localized to the tips. The browing is around the entire edge of the leave I cut off some earlier or I would show it.

Last grow I watered 3 times a day. Regardless of the number of times I water I always water tell runoff to better stabilize ec. Just really scratching my head on this one.
 
lusidghost

lusidghost

Well-Known Member
Let me be clear: I'm not anti-runoff, I'm anti-parroting information that isn't necessarily true. You can overwater coco. You don't necessarily need runoff. You can water multiple times a day, and you can also water every other day depending on the plant / pot size. Coco can dry out fairly thoroughly before it causes wilting. You can also give it plain water from time to time. I don't know why people are so adamant about that one. Coco is a pretty dynamic medium.
 
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