What’s going on

[Gareth Jehan]

Hey,
I’m currently on me second grow of a Blueberry Auto in coco, seed germination went as expected. Seedling looked healthy and as on my previous grow it was going fine, I kept to the same process as before where I was successful. However, this seedling has taken a turn for the worse and leaves have began drooping and going a paler green. I’ve posted some photos, some of my previous grow and some of the seedling that’s in a bad way. It’s just confusing as the conditions are identical, but the outcomes different.

 

[PadawanWarrior]

Hey,
I’m currently on me second grow of a Blueberry Auto in coco, seed germination went as expected. Seedling looked healthy and as on my previous grow it was going fine, I kept to the same process as before where I was successful. However, this seedling has taken a turn for the worse and leaves have began drooping and going a paler green. I’ve posted some photos, some of my previous grow and some of the seedling that’s in a bad way. It’s just confusing as the conditions are identical, but the outcomes different.

Looks overwatered. What kind of soil is that?

 

[Gareth Jehan]

I’m using coco, but I’ve done the same as last time. Watered the same, can’t understand why it’s got different results?

 

[MickFoster]

Are you feeding the poor thing?

 

[Gareth Jehan]

Hi,
No not started with nutes yet. It only popped it’s head up out the coco 13 days ago, so I’m bloody confused as not changed out to the previous grow, which was bloody awesome.

 

[MickFoster]

You're not growing in soil........coco has no nutes in it........you have to provide them.
I start feeding as soon as it sprouts.
Never use plain water.
These plants in coco are the same age as yours.......fed daily to run off.

 

[Gareth Jehan]

Ok thanks. I didn’t feed the last one and it was ok. Do you start the nutes as soon as it pops it’s head out reduced nutes of course

 

[MickFoster]

I start in 1 liter pots.
I saturate the coco with a light bloom solution.
I usually start my daily feedings around day 3 from sprout.
I never use plain water.
Good luck.

 

[inth3shadowz]

I start in 1 liter pots.
I saturate the coco with a light bloom solution.
I usually start my daily feedings around day 3 from sprout.
I never use plain water.
Good luck.

Mick, I found your thread awhile back and have been doing like you say with hempy Coco buckets, INSANE how easy it is. Using Maxibloom, I start 1/4 from sprout then move up weekly.

 

[Gareth Jehan]

Ok I’ll try feeding after a few days, 1/4 strength nutes, thanks

 

[inth3shadowz]

Ok I’ll try feeding after a few days, 1/4 strength nutes, thanks

You can feed it now lol Coco can't be "overwatered". Coco needs to stay saturated to provide oxygen unlike soil that loves dry periods.

 

[Gareth Jehan]

Gotcha

 

[Creature1969]

You can feed it now lol Coco can't be "overwatered". Coco needs to stay saturated to provide oxygen unlike soil that loves dry periods.

Coco absolutely can be overwatered during seedling stage.

Looks overwatered. What kind of soil is that?

Really? First sentence of the post states::

Blueberry Auto in coco,

 

[inth3shadowz]

Coco absolutely can be overwatered during seedling stage.


Really? First sentence of the post states::

Can you prove that? I water my seedlings daily in Coco til runoff, never seen any wilting, or signs of overwatering.

 

[Creature1969]

Can you prove that? I water my seedlings daily in Coco til runoff, never seen any wilting, or signs of overwatering.

Good for you. I've seen many new growers try dumping nutes on seedlings multiple times a day because they were told "you can't over water coco".
I can't prove baby pigeons exist, but I'm sure they do.

 

[inth3shadowz]

Good for you. I've seen many new growers try dumping nutes on seedlings multiple times a day because they were told "you can't over water coco".
I can't prove baby pigeons exist, but I'm sure they do.

If the concentration of the feed is not too high, you could water it 5x a day if you want, but you'd just be wasting nutes. When you allow Coco to dry out, it starts messing with the ion exchange. Telling a beginner that Coco can be overwatered can be just as detrimental because they'll treat it like soil.

 

[Kassiopeija]

Coco needs to stay saturated to provide oxygen

actually the more water u put into it the less atmosphere there will be

 

[inth3shadowz]

actually the more water u put into it the less atmosphere there will be

 

[Kassiopeija]

it has to do with the matrix water potential.
both coco & peat can hold water around 7 times their own dry weight (at least, my ingredients I tested here shows these values)
some of the water is used to quill the fibers - that's unfree/inaccessably to the roots.
what's left is the free - capillary - water, plants can only "drink" this.
now peat/soil has much more free capillary water than coco which creates drought stress much sooner in coco. there, the pot is still heavy but the roots can't drink anymore.

another heavy factor to consider is the amount of perlite - usually coco mixes are 70/30. perlite can only hold twice it's own dryweight in water and given how light it actually is - that's not much. the rest is atmosphere. so perlite offers a place for gas exchange to the roots even if said medium us fully soaked.

 

[Kassiopeija]

it's about CEC.... [relevance?]