Keeps happening every grow. Throwing in the towel

I think your letting the coco dry out too much. It would cause the media to become too salty, which will give you problems. Can cause the Ph to swing too if you're not watering to runoff (I think). PPMs will also be high if you dont runoff cause of the salt buildup.

Try watering at least daily. I used to always say, its impossible to overwater coco, but one member here proved me wrong lol. It's not common

No such thing as root bound. And 2.5 gal pots are big enough for flower. I just ran 9 plants in 2 gal pots for over two months and the roots looked crazy. And had absolutely no problems. If the hairs are turning brown that’s a sign of too much nutrients. Sounds like you’re still in the beginner stages of growing cannabis. You should try soil and a simplistic nutrients like fox farms. Back off on the nutes for a week and see what happens.

Renfro said:

The stripey burn pattern in the first picture indicates a pH problem. Likely the root zone pH is way lower than your input pH.

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I was thinking the same thing!

hotrodharley said:

Not according to a producer of coco. It can be too wet eh?

CANNA COCO | How to Use | CANNA Gardening USA

Because of the high costs of nutrients and the complexity of sophisticated hydroponic systems, more and more growers turn to CANNA COCO. Learn why >

www.cannagardening.com

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Not if it is in a well drained position. Constant fertigation pushes in new oxygen. If you let it dry you get salt build up... like this guy. And you need to flood it so there is 25% run off to wash excess and old salts away. (Trust me I've seen this exact problem before.) If he is watering every 5-6 days he is not watering enough.

OP if you have an EC stick/pen water normally until run off and measure the run off EC, I wouldn't be surprised if it was a lot higher than it should be.

Also you want to vary your ph between 5.8 and 6.2 and in flower lean on the higher side but still vary it.

stop using a blurple led and use a full spectrum, problem solved

I water coc daily until good runoff always with nutes. In flower I’ll usually water twice a day. I start my seedlings out at around 250-300 ppm and go up lil bit each week. By time they a month old I’m usually at 700-850 am ppm. I stay there throughout flower. Always water daily with nutes until decent runoff. In coco you aren’t suppose to water like soil. Coco is basically hydro

Thanks Tint Eastwood. My leaves look exactly like that. Will flush ASAP

JJroro said:

stop using a blurple led and use a full spectrum, problem solved

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It's a full spectrum LED....

FADING-SILHOUETTE said:

If you are running PK you could well be overfeeding..some of those PK formulas are pretty strong, failing that it looks like heat stress ...whats your min max and ambient room temps..? - STELTHY

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Have not ran PK yet. Too early in grow. the temps are around 70-75 degrees.

Looks like overfeeding/ Ph issue to me man. Will be interesting to see if flushing and pulling back on the nutes helps man!

what should i be looking for as far as PH and PPM's from the run-off?

Hey guys i measured my PH for the runoff after just using 6.0 plain water. The runoff is reading 5.3 ph which i assume is to low? Please advise. Run higher ph water through with next feed?

lysergicals said:

Hey guys i measured my PH for the runoff after just using 6.0 plain water. The runoff is reading 5.3 ph which i assume is to low? Please advise. Run higher ph water through with next feed?

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If it were me....

Enough with the plain water.
Mix up fresh nutes to ec of 1.2ish/600ppm - ph 6.2.

Flood feed until major runoff.
Wait 5 min. Feed again. Done.

Walk away and pray. Time to LITFA. Study up on coco while in LITFA mode.

In general, don't feed until an hour or two after lights on.

You got this.

oill said:

Are go fine for a while and then as they get older this starts to happen?

If I'm right then I would bet that you are not letting 25% run off... are you keeping it soaked and watering every day til run off?

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definitely need run off

T macc said:

I think your letting the coco dry out too much. It would cause the media to become too salty, which will give you problems. Can cause the Ph to swing too if you're not watering to runoff (I think). PPMs will also be high if you dont runoff cause of the salt buildup.

Try watering at least daily. I used to always say, its impossible to overwater coco, but one member here proved me wrong lol. It's not common

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I would reduce the amount of feed water every day till 20 percent run off.

Should fix his issue.

When they come back to health then bump the Nutrients if needed.

TintEastwood said:

cannabis ca deficiency - Google Search

View attachment 4574815


View attachment 4574812

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wow didnt even know i had this issue till randomly reading this thank you!

That resembles heat damage for two reasons, the brown leaf tissue death and the leaf edge curling indicating the leaves are too warm. you say it isn't too warm but it looks like your plant thinks it is.

TintEastwood said:

I typically feed my coco at 1.8ec, 6.2ish ph.
3 to 5 times per day.
Root bound is good for coco mutifeeds.

This is the techno on coco.

Understanding Osmosis and EC - Coco For Cannabis - Science

Learn how EC, PPM & TDS affect plants. Understand osmosis (how the plant absorbs water) and why it is critical to measure EC/PPM when you fertigate.

www.cocoforcannabis.com

Growing Cannabis in Coco Coir with High Frequency Fertigation - Coco For Cannabis

Learn how to unlock the magic of growing cannabis in coco coir with high frequency fertigation! Guide to feed and water cannabis in coco like a pro!

www.cocoforcannabis.com

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This.

I feed 8 times. 5.8-6.0ph.
Right now I’m at 1.7 EC 2nd week after flip.

In 2 gallon pots.
8 plants SWAMP a 9x5.

I start at once a day, and work up to the 8-9 feeds during flower.

As soon as I see “issues” I add a feed.

10-20% run off.

Run off checked only for EC so it’s close to input.

Lower. Up EC
Over 150 higher. Drop EC


COCO always wet.

lysergicals said:

Hey guys i measured my PH for the runoff after just using 6.0 plain water. The runoff is reading 5.3 ph which i assume is to low? Please advise. Run higher ph water through with next feed?

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Some legend posted this on the forum and iv been spamming it ever since lol. Look at the calcium and magnesium range, Bingo xD