11 day old seedlings in coco going yellow and drooping

S

Stblazed

Member
Hi.
Looking for help on my seedlings.
I have 4 sensi skunk fems in 15L pots of coco coir and so far have been really good. But today after there first feed of nutes of canna a and b 1ml per L of PH water.
Before this they were getting fed PH water with 2ml per L of rhyzotonic.
They were getting 250ml per plant every 2 days.
I found out yesterday my PH meter was out by nearly 1PH meaning they have been getting water I've been doing at 5.8ph but true PH was 6.8!
One of the looks really healthy but the other 3 are drooping with the leaves touching the coco and 2 are starting to go yellow.
I think they have been over watered for how young they are and how big the pots are and now have nute burn on the first leaves. The new growth looks really good and healthy though.
 

Attachments

  • IMG_2793.JPG
    IMG_2793.JPG
    1.9 MB · Views: 76
20170529_130047-jpg.3950864


These girls are less than 2 weeks old grown with 23W spiral CFLs Dump the blurple for now.
20170529_130448-jpg.3950867

These are the roots (the pointy little white thingies), instead of being around the outside of the ball they radiate from the center.

My method for hand watering is to take a jug slightly larger than the bag then dip the whole bag and make sure the water permeates right to the top. Then place the bag on a drip rack.
The bags are perforated right around so it holds no excess water...

This way you flush out all the old water and shit when you lift the heavy bag of water and it all sucks out through the bottom. It keeps the roots oxygenated and exposed to new water everywhere (no pockets). It is like power ebb and flow. I just top up the jug before doing the next plant, feed the waste to the garden plants after diluting it.

Don't try this with many plants, 10 plants take about 1 hour to do like this.
 
Last edited:
Alwase feed every time. If the runoff is higher than your input than you need to dilute your solution and flush until the runoff reads the same as the input
 
I feed 1/4 strength bloom nutes for the first 2 weeks, then up it to 1/2 strength for a week or so, then full strength. You should never use plain water in coco.

These plants are 3 weeks old from sprout - fed every day.
C-99 3 weeks.JPG
 
  • Like
Reactions: ANC
Stblazed said:
But if mine have nute burn what should I do? Reduce nutes or flush with water?
Click to expand...
Are you using cal mag? If you are growing in coco and not adding calmag and nutes youre plants are gonna suffer and their growth will slow to a crawl. Try feeding them half strength nutes and a full dose and a half of cal mag (7-8)ml/g in the next watering before throwing them away.

PS - you might also want to get familiar with perlite and its purpose
 
Stblazed said:
But if mine have nute burn what should I do? Reduce nutes or flush with water?
Click to expand...
Why do you think you have nute burn? You have only fed the plant once, yesterday - nute burn doesn't occur that quickly. You never, ever, flush with water in coco. Your challenge is going to be maintaining the correct moisture level with a small plant in such a large pot - much easier to control when started in smaller containers.
 
Last edited:
I have calmag but haven't used it yet was advised to used in week 4 I'll add on next feed.
Is it possible to put them in smaller pots now?
the light green colour has to deficientcy right?
And with seedlings that small do I water every day I know coco can be watered every day but in big pots it can't be good for them?
 
MickFoster said:
I feed 1/4 strength bloom nutes for the first 2 weeks, then up it to 1/2 strength for a week or so, then full strength. You should never use plain water in coco.

These plants are 3 weeks old from sprout - fed every day.
View attachment 4062655
Click to expand...
This ^^^^^

To get the maximum benefit of coco it needs to be treated like hydro, i.e. many small waterings a day, to keep old water cycling out and new water cycling in.
 
You'll use nutes, cal-mag, & ph every "watering". I'm thinking they'll be slow, for the first while. As the roots fill the pots, they'll gain speed. I'd water around the edges of your bags, the coco will pull the moisture toward the center. I wouldn't water till runoff, yet.
 
after a feed with weak nutes and some calmag they've picked up over night. I assume that the tips of the leaves that are yellow won't change back to normal?
 
You must log in or register to reply here.

Similar threads

P
First grow - how’s it looking?
Replies
2
Views
398
Fladawg01
Fladawg01
M
My first grow, problems during flowering. Will it be able to finish?
2
Replies
29
Views
2K
Fishmon
F
RDCustoms
First Indoor Auto Grow. Seedling advice please
Replies
12
Views
725
420 Garden
420 Garden
jsynicky
Drooping / clawing leaves.Autos in coco
Replies
14
Views
1K
jsynicky
jsynicky
Greenthumbgrower1986
Help needed
Replies
6
Views
553
Fish scale
Fish scale
Back
Top