Help, i thought i was over watering but not sure

[Ninjadogma]

Also now I wonder if you can precipitate buffers and minerals by sanding the water with rock dust, it's a war against time and gravity but it might work.

OP, do you love magnetic stirrers?

EDIT: EDINGTON EDITION:
I fucked around for a minute... create space between the soil and the pot gentyl, and pour in perlite (about 1/8th inch layer) let the soil relax back and it should work itself in pretty well if you rotate the pot daily. Just by the agitation in the motions. Rock dust will create pockets at this point no matter what.

It sounds counterintuitive, but a proper surfactant actually improves aeration by thinning water films and opening pore space. The only time it becomes a problem is when the dose is too strong — then the water coats everything evenly, pore tension collapses, and the medium behaves more anaerobically. It’s all about staying in the right range.

So you can get some aeration boost with a little bit of surfectant without amending anything. It's not a panacea but it can help.

 

[Ninjadogma]

I'm not saying to water with 10 gal but pots need to be saturated, dry soil wicks moisture away from root tips. Pots should dry uniformly and not have wet and dry pockets. Excessive watering is a bad habit and should be avoided but under watering is worse imho

Absolutely. Peat and coco become hydrophobic and reject water because the "skin" of the water molecules is too hard to penetrate the small pores it's made up of. If working with water alone the pot gets rehydrated very slowly through transference wickering vs actual penetrating. THIS is why we are told if the top layer is bone dry, you've got to reintroduce water very slowly.

 

[trygrowup]

There is no such thing as over watering, you can water too often but its almost impossible to give them too much water at once. You could feed each pot 10 gallons of water at a time and as long as you let them dry back you haven't over watered. excessive yes and you'll wash away any nutrients in the soil but you haven't over watered. I give 3 gallon pots 1 gallon of water or feed, 5 gal pots 1.75 gal at a time.

BY THE EMPEROR!

lmao, I kid but another thing to think about is light distance. You might have the correct light amount and intensity but still be too close (and I am always too close). I don't get as brave with light as like NyarlthloFloridaMike but he also compensates and goes to pound town for weight, my style is more casual.
Might also be as much wet roots as over watering OR there is soil compaction. Many things are possible, most things are fixable.
Gal and Grown might be on the track for this one.

To both of you. I'm a bit confused.
Did you tag the wrong person because i just showed how my under watered plants looked for comparison?

 

[dr.thumbgreen]

Temp is ok, what's the humidity? Other things can make them look over watered. You're trying to diagnose a turgor pressure issue. What are they growing in and what are you feeding/watering them with?

100% coco coir, nutes as pictured

Here is what my under watering looks like.
View attachment 2639655View attachment 2639656
They are very dry now for 2nd time

Thanks mate

 

[dr.thumbgreen]

I didn't catch that the first read. 75% rh at that temperature is like .6 vpd. In those conditions your plants can't "breathe" normally because there's not enough water being pulled through by the atmosphere, it's too saturated. Water inside the plant needs to evaporate when it opens the stomata so more water can be pulled up from the ground. If the osmotic pressure from the roots is much greater than the loss from the top, the plant can take on this swollen look.

If that was the case though, your soil shouldn't be drying out so fast, so something doesn't add up. 9 days from where they started to where they are is hard for me to wrap my head around, given the info you've provided.

If they've got roots coming out the bottom already you should get them into bigger fabric pots now anyway. You'll be able to get a good look for yourself what's going on down there.

The 9 days was just referencing when i got them and to indicate growth rate. I have watered and fed every 3 days

 

[dr.thumbgreen]

The 9 days was just referencing when i got them and to indicate growth rate. I have watered and fed every 3 days

Also what rh should i be aiming for with a temp of around 23 Celsius

 

[ChairmanFester]

Oh I did,

To both of you. I'm a bit confused.
Did you tag the wrong person because i just showed how my under watered plants looked for comparison?

I did, I was trying to tag the OP photo.

 

[ChairmanFester]

I may, or may not, have been at wing night high as shit hitting on the bartender in character as Commander William T. Riker. Which allegedly messed with my posting attempt.

 

[dr.thumbgreen]

This posture is "low osmotic pressure." Has a couple causes but two together are a recipe for trouble: an undersized pot with high EC. A deep watering will lighten the EC load and it'll be a more forgiving environment if the roots have room to stretch out. Once conditions improve the fans don't necessarily untuck themselves from that posture. If they've been like that for a little while theyll keep the shape but new growth will look better... You'll see the tops perked and new growth will break from the bad posture.

Wierdly enough they seem to have bounced back a fair bit only 2 days since last water, was good to know the fans dont follow suit as everything else seems to have perked up and new growth looks good. Still seems a little lime coloured not dark green enough though although they had shot up a little close to light for my liking signs of bleaching on fans and a tiny bit of taco, have also spread them a little and removed just a couple fans

 

[dr.thumbgreen]

I didn't catch that the first read. 75% rh at that temperature is like .6 vpd. In those conditions your plants can't "breathe" normally because there's not enough water being pulled through by the atmosphere, it's too saturated. Water inside the plant needs to evaporate when it opens the stomata so more water can be pulled up from the ground. If the osmotic pressure from the roots is much greater than the loss from the top, the plant can take on this swollen look.

If that was the case though, your soil shouldn't be drying out so fast, so something doesn't add up. 9 days from where they started to where they are is hard for me to wrap my head around, given the info you've provided.

If they've got roots coming out the bottom already you should get them into bigger fabric pots now anyway. You'll be able to get a good look for yourself what's going on down there.

So just aim for somewhere in the range of a veg vpd chart? Introduce a little more heat you think

 

[trygrowup]

I may, or may not, have been at wing night high as shit hitting on the bartender in character as Commander William T. Riker. Which allegedly messed with my posting attempt.

Don't say that. the posting has been acting strange with posting self.
happened to me and another too.

 

[ChairmanFester]

Don't say that. the posting has been acting strange with posting self.
happened to me and another too.

She had enormous Phaser Banks and told me three times about her recent divorce.
Allegedly.

Some of that lime green might be joy at bounce back too. Being a little eager pushing out new growth.

 

[trygrowup]

She had enormous Phaser Banks and told me three times about her recent divorce.
Allegedly.

Some of that lime green might be joy at bounce back too. Being a little eager pushing out new growth.

I think the posting system is broken
I bet you didn't answer my post wrong twice.

 

[dr.thumbgreen]

Hey all back again, have the low osmotic pressure posture again. They have moved into big tent and have shown same signs as before. I have only today introduced a heater as overnight temps had been very low ans yesterday potted up the big girls i wouldnt of said they were dry to the touch and the roots were nice and white. Funnily enough the runt plants pots seemed heavier and i did not bother to water them but all the big girls got 3-4 L untill run off (19L pots) when repotting my question is now with a solid way to monitor and some more dialled in paramaters what do i look at next.

 

[dr.thumbgreen]

Hey all back again, have the low osmotic pressure posture again. They have moved into big tent and have shown same signs as before. I have only today introduced a heater as overnight temps had been very low ans yesterday potted up the big girls i wouldnt of said they were dry to the touch and the roots were nice and white. Funnily enough the runt plants pots seemed heavier and i did not bother to water them but all the big girls got 3-4 L untill run off (19L pots) when repotting my question is now with a solid way to monitor and some more dialled in paramaters what do i look at next.

These are the runts and pics of last night for reference

 

[Galgrows]

If that floor is cold get them up off it onto risers. They appear to be overwatered and cold.

 

[dr.thumbgreen]

If that floor is cold get them up off it onto risers. They appear to be overwatered and cold.

Shop was closed today but will buy some trays and see if they have any stands tomorrow, again they seem to be standing up a bit more again, heater was introduced yesterday arvo and have held pretty steady between 0.9 and 1.1 vpd. Also put lights to 40% to give them some respite while they looked so sad. Would you hold off another day for watering i transplanted and gave a soaking 2 days ago.

 

[trygrowup]

Looks like a watering problem, like others have pointed out.
Have you got this link?
https://www.growweedeasy.com/cannabis-plant-problems/overwatering

It is one of the things that can be tricky, getting the watering right.
Some pot lifting will help when you get the hang of it.
Good drainage in the soil also helps giving some air to the soil.
But it could be over and under watering at the same time.
If watering too often with too little water for example.

 

[dr.thumbgreen]

Looks like a watering problem, like others have pointed out.
Have you got this link?
https://www.growweedeasy.com/cannabis-plant-problems/overwatering

It is one of the things that can be tricky, getting the watering right.
Some pot lifting will help when you get the hang of it.
Good drainage in the soil also helps giving some air to the soil.
But it could be over and under watering at the same time.
If watering too often with too little water for example.

Thanks i have a feeling you may be on the money. Only the last 2 waterings have i watered untill runoff. So possibly not enough of a soaking and maybe too often was every 3 days so far untill now and have been in plastic pots till 2 days ago. Can they still be slightly damp and ready for a water. The pots seemed light when i transported but was still a little damp. For reference they seemed alot lighter than the runts i left in plastic pots.

 

[trygrowup]

Oh man that's hard to say from here.
They would always be damp.
But when you transplanted. Were the roots all down the bottom?
I did suspect they were bottom heavy but from what you're saying they are not.
It looks like they look better after you have changed how you water.
And it's good you try to change it up when things doesn't look right.
Look to me like you're on the right track.