clones in coco drooping yellow leaves

[sjk90]

My plants in coco are drooping, yellow leaves with brown spots/ edges and purple stems overall they look messed up.

It started after I transplant them 2 weeks ago from quart containers to 3 gal bags with coco bricks and put them under stronger led strips.

I prepared the bricks by flushing them with tap water EC 0,6 till I got the same EC runoff as my tap water then soaked them in GH calmag EC 1,5 over night, after that fresh calmag solution and another 8 hour soak, then I flushed the bags with EC 1,2 floraflex veg solution.

It looks like it get worse by the day and I can't seem to figure out what causes it, hope someone can help!


They get 2 waterings a day with 20-30% runoff

Temp day 78f night 70f
Humidity 60-70%
In PH 5,8 EC 1,20
runoff PH 6,3 EC 1,10

 

[tobedetermined]

To me they look like they are water-logged or light-exhausted – too much of something. I would back off on both - let them dry out for a day or two and raise your light.

Are you still giving them cal/mag every feed or just the initial blast?

 

[sjk90]

Over-watered was my initial thought also, I skipped a day watering but they didn't improve after that, maybe I need to wait a couple more days but I also read everywhere that you need to water coco every day and never let it dry out and it can't be over-watered so I'm not totally sure what's best.

ppfd is around 700 edges a little less, measured with apogee meter

Are you still giving them cal/mag every feed or just the initial blast?

only initial blast of calmag, my tap water is EC 0,6 i dilute it a bit with RO water to EC 0,3 / 0,4

 

[gmanwho]

increase the temps to 82-84 day , lower the light intensity, bigger dry downs till the roots can absorb the water properly. that heavy purple stems can be indication to a over water situation

alot of times just after transplants i dont water till run off. with a dry 3 gal pot of coco it probably takes just under 1 gallon to achieve run off. so i water about 1/2 gal only till i start seeing them absorb the water in less then 2-3 days. staying cold an wet that long stunts them, then over light. gotta get the containers dry so the roots search. dry medium an humid air (75-80%)

Some mycorhizae during the transplant can help get those roots to fill the container faster an get you off and running sooner.

best of luck

 

[OG_Bishop]

first off, do NOT flush out your coco until you get whatever ppm.... thats not a thing. dont wash the coco.

"I prepared the bricks by flushing them with tap water EC 0,6 till I got the same EC runoff as my tap water then soaked them in GH calmag EC 1,5 over night, after that fresh calmag solution and another 8 hour soak, then I flushed the bags with EC 1,2 floraflex veg solution."


wtf... you "soak" the coco? im confused.... and 1.5 EC of JUST calmag?!

 

[sjk90]

Forgot to mention first 5 days after transplanting I didn't water, after that 1 week off 1 watering a day and after that 2 times a day

gotta get the containers dry so the roots search. dry medium an humid air (75-80%)

Some mycorhizae during the transplant can help get those roots to fill the container faster an get you off and running sooner.

best of luck

Containers are filled with healthy white roots, sides and bottom so I thought they could handle 2 waterings a day, they also get real growers recharge every 10 days.


Thank's for the tip! I will try to up my temp, lower the ppfd and let them dry down for a couple days.

wtf... you "soak" the coco? im confused.... and 1.5 EC of JUST calmag?!

Rinsing and soaking coco in calmag is called buffering, normally I buy bags off canna coco so it's not needed but I couldn't get them this time and went with floraflex bricks. The runoff from these bricks was over EC 2,1 so flushed them with tap water and after that I soaked them in calmag solution

 

[OG_Bishop]

dude... there is no reason to rinse your coco. your coco COMES already buffered... hence, not needing to give a shit about the pH. stop doing more than you need

edit: the water you're using is far from ideal. use ALL RO!

 

[tobedetermined]

your coco COMES already buffered... hence, not needing to give a shit about the pH. stop doing more than you need

edit: the water you're using is far from ideal. use ALL RO!

Unfortunately, some cheap coco is merely hosed down at source with water before it is dried and bricked - so not really buffered. Canna and the name brands are always properly buffered.

And RO water is the best - yes. But . . . many of us use city water very successfully. You just have to adjust for it.

 

[OG_Bishop]

if you're washing coco out, you're buying something not intended to be used to grow weed... again, making things harder than they need to be.

 

[sjk90]

I raised and dimt the light and didn't water them for 3 days but they look worse than before.

What I find weird is I watered them a moment ago and the bags where light in weight, it took a pretty large amount of water to get 20% runoff so I expected from the coco drying out a high EC runoff but the EC runoff was slightly lower than what was going in.

In PH 5,8 EC 1,21 runoff PH 6,2 EC 1,17

Does it mean I'm maybe underfeeding them? I'm a bit confused because it looks like the newer growth has slightly burned tips.


Or could it be a potassium deficiency? Symptoms do look a bit the same.

 

[44:86N]

Or could it be a potassium deficiency? Symptoms do look a bit the same.

That is what it looks like. I'm not sure why, and it's been a long time since I've used coco, but I always had to up my K. I used straight Potassium Nitrate @ 100ppm/gallon as a supplement.

 

[tobedetermined]

Burnt tips usually means that you have hit max nute strength or an imbalance. What are you feeding them?

 

[LostTribe]

I raised and dimt the light and didn't water them for 3 days but they look worse than before.

What I find weird is I watered them a moment ago and the bags where light in weight, it took a pretty large amount of water to get 20% runoff so I expected from the coco drying out a high EC runoff but the EC runoff was slightly lower than what was going in.

In PH 5,8 EC 1,21 runoff PH 6,2 EC 1,17

Does it mean I'm maybe underfeeding them? I'm a bit confused because it looks like the newer growth has slightly burned tips.


Or could it be a potassium deficiency? Symptoms do look a bit the same.

I am giving coco a second go after a few issues about 2 years ago. I had some coco bricks leftover so decided to give it another try. I have 2 of DJ's new f13's that are having alot of leaf issues and very slow growth. Similar to your pics somewhat but it has gotten worse. I have dialed my led back and reset the coco to 1.0ec ph 5.8. I was watering at way too high ec like 2.0 as my og's were yellowing but no tip issuses. Runoff was like 3.0ec and ph was way up at 6.5.

Keep checking your runoff and ph before watering with it. Ph can shift overnight if you dont mix them daily too. I'd say to lower your ec as the tips look burnt even on the new growth which is usually a tell tale sign of overfeeding. My f13's have started to green up after about a weeks time.

 

[sjk90]

Burnt tips usually means that you have hit max nute strength or an imbalance. What are you feeding them?

They get FloraFlex dry nutes Veg1 and Veg2 equal parts, PH 5,8 EC 1,2. I find it strange that the runoff is slightly lower than what's going in, this should mean that I'm not overfeeding them I would think.

I am giving coco a second go after a few issues about 2 years ago. I had some coco bricks leftover so decided to give it another try. I have 2 of DJ's new f13's that are having alot of leaf issues and very slow growth. Similar to your pics somewhat but it has gotten worse. I have dialed my led back and reset the coco to 1.0ec ph 5.8. I was watering at way too high ec like 2.0 as my og's were yellowing but no tip issuses. Runoff was like 3.0ec and ph was way up at 6.5.

Keep checking your runoff and ph before watering with it. Ph can shift overnight if you dont mix them daily too. I'd say to lower your ec as the tips look burnt even on the new growth which is usually a tell tale sign of overfeeding. My f13's have started to green up after about a weeks time.

I find it strange that I have burned tips even though my runoff is slightly lower than what's going in, they also only get an EC of 1,2 what I think is not that high for plants this size.
Also can't place the light green/ yellow color with overfeeding, with overfeeding i always think of dark green shiny leaves with burned tips.
PH off my runoff is 6,2 so that's fine I think and not the problem.
But now that over-watering doesn't seem to be the problem I don't know what else can be the problem so I will try to lower the EC to 1,0

 

[tobedetermined]

How is it going? Any improvement?

Btw . . . I use Canna's Coco A+B, so a coco specific nute mix. And a cal/mg supplement with every feed.

 

[sjk90]

I think it's underfeeding! The suggested tips didn't really work so I could only think of maybe I'm not feeding enough, first tested it on one plant gave her EC 1,6 next day I already saw improvement and the leaves where a bit less yellow.

After that I start giving them all EC 1,6 PH 5,8 Day 2 now off higher EC and the new growth is praying to the light, think it's still a long way to go before they look totally healthy again but we will see.

Only thing I'm a bit worried about is my runoff PH is slowly rising and now come's back at 6,4

In PH 5,8 EC 1,6 runoff PH 6,4 EC 1,2.

 

[OG_Bishop]

here is a tip: STOP WORRYING ABOUT THE PH!!!!

 

[sjk90]

The plants are looking a bit better, removed 4 and saved 8 and transplanted them to 4 gal containers.

The last couple days I noticed that the higher and new growth is starting to turn light green/ yellow again.

I'm not sure if I need to feed them a higher EC, they now get PH 5,8 EC 1,60 and my runoff is PH 6,5 EC 0,99 so runoff EC is very low.

This strain is amnesia and I haven grown her countless time's in soil and rarely need to feed higher than EC 1,4 so I'm a bit confused why in coco they seeming to need such higher EC.

 

[sjk90]

The runoff PH kept rising, last week it was 6,7 and de EC keep consistently coming back low around 1,10. Yesterday I flushed them with 2 gal each (they're in 4 gal containers) with PH 5,7 EC 1,55 runoff was PH 6,2 EC 1,44.

Today I watered them again with PH 5,7 EC 1,51 the runoff PH is already coming back higher at 6,4 en EC is low again at 1,24.

Weird thing is when I use my bluelab leap probe directly in the coco it measured PH 5,5.

Why is my EC consistently coming back lower? I thought when it's coming back lower you need to up your EC but I was seeing slightly burned tips so I backed down from 1,6 to 1,5

And why is my PH always rising even though my coco measuring is 5,5?

The new growth is a bit pale green so I'm a bit worried.

 

[Akss]

Sounds like your reading the plants pretty good but are afraid to do what you think... I would up the ec a little.. they are hungry you should be able to up it till the ec comes out atleast 1 to 200 ppm more than whats going in without problems any more than that and i would dial it back a little... What type of lighting are you under?