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Screwup said:
Your good grows don’t negate bad information. Proper surface conditions happen with correct FAE and field capacity substrate. Spraying the walls is just…spraying the walls.

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Lefty68W said:


I agree with you on almost everything. I have to disagree on  misting tub walls.

I keep my tub walls and lid wet. I never mist the cake. I get great results.

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johnukguy said:

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Lefty68W said:


I agree with you on almost everything. I have to disagree on  misting tub walls.

I keep my tub walls and lid wet. I never mist the cake. I get great results.

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I'm glad that you agree with me a lot but this isn't about agreement. Misting the tub walls does little of any benefit for the substrate surface, and is old and debunked Tek.

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A.k.a said:
He’s not talking about the surface, just raising humidity in general.

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Screwup said:
Ah I see. If his substrate had proper surface conditions why spray the walls? Just to help prevent drying out I guess?

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Roger Rabbit Said:

Bad advice in a few posts above.

You MUST mist your cakes.  Evaporation of moisture from the cake or other substrate is the number one pinning trigger, bar none.  This is why we provide for lots of fresh air exchange.  Even at 99% humidity, if you're giving the proper amount of fresh air, the cake will lose moisture.  If it did not, it would either not pin at all, or pin poorly.

You mist daily to replace this lost moisture.  The walls of the terrarium are not growing mushrooms, so it's a waste of water and time to spray them.  You spray the cakes, and the overspray from doing so re-hydrates the perlite, keeping humidity in the proper range.
RR

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Mushpunx Said:

You need to learn how to properly dial in a tub man.
First off misting the walls is useless...Condensation on the walls of the tub means nothing. It fluctuates with temperature changes. What matters is the condensation on the sub surface. Don't read into the walls.

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MudaFuka Said:

You cant see humidity don't mist your walls.

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johnukguy said:
There are multiple threads here detailing why misting the walls is largely a waste of water and time. I'm sure that, as you say, you've had good results but that's not directly from misting the walls of the tub.

This has been known for years, but still the old idea about misting tub walls persists. Even RR was pointing out, over a decade ago, that this doesn't have any substantive benefits and in his words is 'bad advice:'

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Roger Rabbit Said:

Bad advice in a few posts above.

You MUST mist your cakes.  Evaporation of moisture from the cake or other substrate is the number one pinning trigger, bar none.  This is why we provide for lots of fresh air exchange.  Even at 99% humidity, if you're giving the proper amount of fresh air, the cake will lose moisture.  If it did not, it would either not pin at all, or pin poorly.

You mist daily to replace this lost moisture.  The walls of the terrarium are not growing mushrooms, so it's a waste of water and time to spray them.  You spray the cakes, and the overspray from doing so re-hydrates the perlite, keeping humidity in the proper range.
RR

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https://www.shroomery.org/forums/showflat.php/Number/16304737

https://www.shroomery.org/forums/showflat.php/Number/25787281

This is why the vast majority of TC's and experienced cultivators here don't recommend misting tub walls and will go so far as to call it out as bad advice.

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Lefty68W said:

And I feel differently. Humidity is created by water evaporating. I believe you think I am missing my walls and lid daily or in some schedule. I must only if the walls and lid start to get dry.

The condensation on the walls and lid is part of the tubs natural humidifier. And saying things like misting the walls and is bad information it can hurt new growers.

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Roger Rabbit Said:

Bad advice in a few posts above.

You MUST mist your cakes.  Evaporation of moisture from the cake or other substrate is the number one pinning trigger, bar none.  This is why we provide for lots of fresh air exchange.  Even at 99% humidity, if you're giving the proper amount of fresh air, the cake will lose moisture.  If it did not, it would either not pin at all, or pin poorly.

You mist daily to replace this lost moisture.  The walls of the terrarium are not growing mushrooms, so it's a waste of water and time to spray them.  You spray the cakes, and the overspray from doing so re-hydrates the perlite, keeping humidity in the proper range.
RR

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Munchauzen Said:


this is just bad advice. the droplets on the lid do absolutely nothing. there are zero mushrooms growing on the lid...If you rely on condensation droplets, you have no control on the level of hydration. Did the droplets hydrate the surface enough or too much? Or what if somebody changes the thermostat, now the condensation is gone.

You're suggesting a lazy, half assed approach as a replacement for something that takes like 5 seconds. Thats just bad advice, dood.

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johnukguy said:

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Lefty68W said:

And I feel differently. Humidity is created by water evaporating. I believe you think I am missing my walls and lid daily or in some schedule. I must only if the walls and lid start to get dry.

The condensation on the walls and lid is part of the tubs natural humidifier. And saying things like misting the walls and is bad information it can hurt new growers.

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Again, it's not about how we feel. It's basic science. Condensation on the tub walls is due to temperature differentials and is not a reliable indicator of surface conditions.

This then is not down to personal opinion but simple known facts. The condensation that matters therefore isn't on the tub walls. It's from the substrate surface. You are not growing mushrooms on plastic.

And yes, bad advice can be detrimental to new growers, which is why so often advising people to mist tub walls and lids is called out here as being exactly that - bad advice. As RR said:

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Roger Rabbit Said:

Bad advice in a few posts above.

You MUST mist your cakes.  Evaporation of moisture from the cake or other substrate is the number one pinning trigger, bar none.  This is why we provide for lots of fresh air exchange.  Even at 99% humidity, if you're giving the proper amount of fresh air, the cake will lose moisture.  If it did not, it would either not pin at all, or pin poorly.

You mist daily to replace this lost moisture.  The walls of the terrarium are not growing mushrooms, so it's a waste of water and time to spray them.  You spray the cakes, and the overspray from doing so re-hydrates the perlite, keeping humidity in the proper range.
RR

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And yes, you are correct, things do change as we learn more. Old school growers years back thought that misting tub walls and lids was good practice and helpful. But for over a decade now that's not been the consensus at all, since it's been established beyond doubt that surface conditions and moisture there is what matters, not condensation on tub walls and lids.

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altford78 said:
The way I'm reading it is you are trying to say that you have an almost closed loop system which regulates itself, and you mist the walls to kind of top up any small losses in water.

This presupposes you have enough water in the sub to account for fruiting and evaporative losses.

Misting the walls is bad advice because the average grow is nowhere near such perfect conditions.

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johnukguy said:
I see an error here. The confusion seems to be that you're using condensation on the tub lid and walls as a reliable measure of the surface conditions of the cake/substrate, under the umbrella of general relative humidity in the tub.

Again, as was made clear by TC's in the threads quoted, and as simple science, condensation on the tub walls and lid is due to temperature differential. It isn't directly indicative of surface conditions and is not a reliable measure for surface conditions.

This is why the practice of misting tub walls and lids is routinely called out here as being bad advice.

I realize that you're not going to change your mind, so will end my part of this discussion here, but do be aware that the consensus for some years is that this thinking is outdated and inaccurate. Hence why this practice is almost universally not encouraged or supported here.

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Way said:
I would just like to point out that full canopies aren't indicative of perfect growing conditions, and all of the split caps in your profile picture are indicative of less than ideal conditions.

It at is is bad advice to give to people to mist the walls. Period.

Is it harmful? Who fucking knows. Is it less efficient in my experience than misting the surface directly? By far.

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Lefty68W said:

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Way said:
I would just like to point out that full canopies aren't indicative of perfect growing conditions, and all of the split caps in your profile picture are indicative of less than ideal conditions.

It at is is bad advice to give to people to mist the walls. Period.

Is it harmful? Who fucking knows. Is it less efficient in my experience than misting the surface directly? By far.

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Oh please. You aren’t getting full canopies and yields without proper surface conditions. Next it’s also on how my tubs fruit. My GT, B+ and Blue Meanies all are harvested 11-12 days after spawning. What would you say is a good measure of surface conditions If not by results?

How is it less efficient than misting the surface directly?

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