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Day 5 flower. Defoliate because Humidity is hard to manage?

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Day 5 flower. Defoliate because Humidity is hard to manage?

lockedshed 48 Replies 3,468 Views
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lockedshed

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#1
Hi
Im in day 5 of flower. Ive only took a couple of big leaves off each plant about 2 weeks ago.

Even with a high cfm kit, the plants are touching each other and the tent sides.
Also, the lower bud sites are covered by the higher leaves so no light can get to them.

One plant is much taller than the rest, and i was wondering if I need to put a scrog net up and defoliate, for humidity control/air flow and to even out the canopy?

The lowest humidity I can achieve is around 60% and it can spike at 68%, even with a 6 inch inline fan on setting 9 and a 20 litre compressor dehumidifier in lung room running non stop.
Spikes after feeding.
Coco/perlite, 500ml - 1 litre twice daily.
619ppfd

I was thinking of getting a second dehumidifier if that work better than one, maybe the ac infinity hydrone but I've read mixed reviews.

1. Should I defoliate on day 6 of flower and how much?
2. Should I use my scrog net to help even out the canopy and control the bigger plants?
3. Should I get a second dehumidifier/ac infinity hydrone dehumidifier.

Thanks
 

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#2
Never defoliate a flowering plant before the plants been in flower long enough to stop stretching ; ie after two weeks

The plants looks fine imo I would just let them ride. I might of vegged a week longer but that’s my preference.

You’ll get some telling you to do some defoliation however most of them haven’t let a plant ride so have no comparison some do some don’t so take everything bar don’t defoliate till it’s been in flower at least two weeks / it’s stopped stretching with a pinch of salt.

Those leaves are there for a reason & pulling them of doesn’t mean the yeild will be bigger

They will start stretching and will do well left alone.

Unless you’re humidity is hitting the 70s then I don’t even know why you’re worrying about it
It really doesn’t matter if one part of your tent is in the 50s and the other parts differ it really doesn’t matter.

The only worry about humidity when it’s in the 70s and during the summer in a tent I really doubt it’s in the 70s unless you’re not ventilating
 
#3
@Gmix is correct .
I (usually) do a day 0 (day of flip) prune.
Leave the main shoots I want to take forward
Then
a day 21 prune
(This is the one called LOLLIPOP)
stuff that doesn't reach canopy
EVERYTHING !!!
Then a day 35 prune (kinda minor and just FANS)
 
#4
Your
lockedshed said:
Hi
Im in day 5 of flower. Ive only took a couple of big leaves off each plant about 2 weeks ago.

Even with a high cfm kit, the plants are touching each other and the tent sides.
Also, the lower bud sites are covered by the higher leaves so no light can get to them.

One plant is much taller than the rest, and i was wondering if I need to put a scrog net up and defoliate, for humidity control/air flow and to even out the canopy?

The lowest humidity I can achieve is around 60% and it can spike at 68%, even with a 6 inch inline fan on setting 9 and a 20 litre compressor dehumidifier in lung room running non stop.
Spikes after feeding.
Coco/perlite, 500ml - 1 litre twice daily.
619ppfd

I was thinking of getting a second dehumidifier if that work better than one, maybe the ac infinity hydrone but I've read mixed reviews.

1. Should I defoliate on day 6 of flower and how much?
2. Should I use my scrog net to help even out the canopy and control the bigger plants?
3. Should I get a second dehumidifier/ac infinity hydrone dehumidifier.

Thanks
Click to expand...
These plants didn't get much LST or supercropping
2 ways to increase yield (indoor for sure)
You do have a couple first weeks of stretch to do LST or supercropping but don't TOP
 
#5
Gmix said:
Never defoliate a flowering plant before the plants been in flower long enough to stop stretching ; ie after two weeks

The plants looks fine imo I would just let them ride. I might of vegged a week longer but that’s my preference.

You’ll get some telling you to do some defoliation however most of them haven’t let a plant ride so have no comparison some do some don’t so take everything bar don’t defoliate till it’s been in flower at least two weeks / it’s stopped stretching with a pinch of salt.

Those leaves are there for a reason & pulling them of doesn’t mean the yeild will be bigger

They will start stretching and will do well left alone.

Unless you’re humidity is hitting the 70s then I don’t even know why you’re worrying about it
It really doesn’t matter if one part of your tent is in the 50s and the other parts differ it really doesn’t matter.

The only worry about humidity when it’s in the 70s and during the summer in a tent I really doubt it’s in the 70s unless you’re not ventilating
Click to expand...
I'm hitting 69% humidity during lights on at night.
I intake and exhaust into the same room with my tent and everything- my only option unfortunately.
I have a 20L/day dehumidifier set to its lowest setting 30%RH.
It fills its tank daily.

I'm looking at getting a 25L/day aeocky dehumidifier for the room also so I have two running and bring down that high 60's RH.

If im not supposed to defoliate yet, and im in the high 60's RH, do I not run the risk of big issues with so many leaves overlapping/touching each other/pressing up against the tent and blocking bud sites?
Thanks
 
Last edited:
#6
If I separate "defoliate" and "maintenance trim", well I trim in flower sometimes. NEVER like in veg where almost the bottom 1/3rd is just the biggest sparsest leaves left.
Another thing I do is let suckers ride just a little. Let them boost the fertility hormones, then pluck. Of course this is just one of the 30 theories that seems to work in practice but who knows, could do nothing.
And if you're just clipping damage it ain't a thing. Out of a whole plant one pissy leaf with a dead spot versus a whole plant that is happy and green is not a real symptom.
 
#7
If the RH in your lung room is good the problem is airflow. If you're using passive intake it might not be enough. If the walls of your tent are sucked in like someone trying to suck a marble through a straw, you're not getting the rated cfm from your exhaust fan.

Adding an intake fan will ensure that the less humid air in your lung room can replace what's in the tent more efficiently. Plants in an enclosed space will raise humidity no matter how much you defoliate them, it's all about managing the air flow first.
 
#8
Grownsince95 said:
If the RH in your lung room is good the problem is airflow. If you're using passive intake it might not be enough. If the walls of your tent are sucked in like someone trying to suck a marble through a straw, you're not getting the rated cfm from your exhaust fan.

Adding an intake fan will ensure that the less humid air in your lung room can replace what's in the tent more efficiently. Plants in an enclosed space will raise humidity no matter how much you defoliate them, it's all about managing the air flow first.
Click to expand...
The walls do suck in under the negative pressure.
I went negative pressure as I read that positive can leak smells out constantly which I cannot have.

I have an ac infinity 6 inch fan with charcoal filter.
When I was researching equipment, a 6 inch inline fan with the filter was good enough for a 4x4 tent with 4 plants to manage airflow in my environment.
It's all quite confusing.

So you really think I need to add a fan for the intake? Which kind would you recommended and what settings...etc should I use?

Do I need another dehumidifier to manage the high 60's RH or would the intake fan really bring that down?

Should I defoliate/trim a bit now as my space is getting very limited?

Do I need to put a scrog in or take any other action to try and maintain an even canopy due to the taller plants growing more than the others?
 
#9
What's the RH in the lung room? You can still have negative pressure with a powered intake.

I wouldn't add too many things like a scrog to figure out at this point but that's your choice to make. Provide as close to a perfect environment as you can and stay out of their way. Observe them and support.
 
#10
Grownsince95 said:
What's the RH in the lung room? You can still have negative pressure with a powered intake.

I wouldn't add too many things like a scrog to figure out at this point but that's your choice to make. Provide as close to a perfect environment as you can and stay out of their way. Observe them and support.
Click to expand...
First picture shows dehumidifier.
Says lung room is 40%, target is 30.

Second pic is tent graph showing the lights on and off humidity
 

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#11
lockedshed said:
First picture shows dehumidifier.
Says lung room is 40%, target is 30.

Second pic is tent graph showing the lights on and off humidity
Click to expand...
What are fans 1 and 4? I assume 2 and 3 are your inside circulation?

It looks like you're running higher night temps to compensate for the humidity spikes. What are the triggers for everything, vpd?
 
#12
Grownsince95 said:
What's the RH in the lung room? You can still have negative pressure with a powered intake.

I wouldn't add too many things like a scrog to figure out at this point but that's your choice to make. Provide as close to a perfect environment as you can and stay out of their way. Observe them and support.
Click to expand...
this guy will give you good advice as have many.

Tuck the big ones under each other there getting more light than you realise.

Yes deff as @Tahoekushcat said do some lst

Also feed them veg food for the first two weeks of flowering.

Defo sort that humidity out

the folk here will see you right & it looks like @Grownsince95 is gonna help so I know your in good hands

Lastly imo you would of been better vegging a week longer, don’t fuss they touch each other they outa fill the tent out just make sure you have good airflow & your humidity gets sorted

Good luck enjoy the adventure

🙂
 
#13
Grownsince95 said:
What are fans 1 and 4? I assume 2 and 3 are your inside circulation?

It looks like you're running higher night temps to compensate for the humidity4 i spikes. What are the triggers for everything, vpd?
Click to expand...
Number 1 is inline fan, on setting 9, and number 4 is humidifier.

I have no control over temperature apart from home central heating does not drop below 20c ever and I have an aircon unit incase summer gets stupid hot in my house. Yet to use it.
 
#14
Gmix said:
this guy will give you good advice as have many.

Tuck the big ones under each other there getting more light than you realise.

Yes deff as @Tahoekushcat said do some lst

Also feed them veg food for the first two weeks of flowering.

Defo sort that humidity out

the folk here will see you right & it looks like @Grownsince95 is gonna help so I know your in good hands

Lastly imo you would of been better vegging a week longer, don’t fuss they touch each other they outa fill the tent out just make sure you have good airflow & your humidity gets sorted

Good luck enjoy the adventure

🙂
Click to expand...
What lst do you think?
I asked about a scrog, thinking i can tuck the taller ones under it to even things out.
I already own a scrog so its one less thing to have to buy.

What's veg food?
I'm feeding 3.0ml/litre canna a+b, have been just before flower.

Nobody really has advice on the humidity so I'm just going to buy another dehumidifier and hope it helps having two on.
 
#15
Something is not making sense to me sorry, if your temperature is hotter with the lights off and you have high humidity why do you have a humidifier running?
 
#16
lockedshed said:
What lst do you think?
I asked about a scrog, thinking i can tuck the taller ones under it to even things out.
I already own a scrog so its one less thing to have to buy.

What's veg food?
I'm feeding 3.0ml/litre canna a+b, have been just before flower.

Nobody really has advice on the humidity so I'm just going to buy another dehumidifier and hope it helps having two on.
Click to expand...
I told you to move more air through your tent. If you have 40% rh in your lung room and the tent is 68% you don't need another dehumidifier. You need active intake and to set your vpd correctly.
 
#17
Grownsince95 said:
Something is not making sense to me sorry, if your temperature is hotter with the lights off and you have high humidity why do you have a humidifier running?
Click to expand...
My lights are off from 9am - 9pm
Its hotter in the day with lights off due to the weather is believe.

The humidifier was set at 61rh so I did not get an even bigger swing when it hits 69rh.....
I can get the room lower, I don't know how much lower...but isn't that bad if it swings from say 55rh to 69rh?
Reas that big swings are bad.

There is an awful lot of conflicting information for a new grower and im just trying to sift through it all and ask questions.
 
#18
Grownsince95 said:
I told you to move more air through your tent. If you have 40% rh in your lung room and the tent is 68% you don't need another dehumidifier. You need active intake and to set your vpd correctly.
Click to expand...
My 6 inch on setting 9 is sucking hard from the intake hose and blowing hard out of the exhaust.

Im not understanding about the need for an intake fan if my inline is sucking in hard from the lung room?
 
#19
lockedshed said:
My lights are off from 9am - 9pm
Its hotter in the day with lights off due to the weather is believe.

The humidifier was set at 61rh so I did not get an even bigger swing when it hits 69rh.....
I can get the room lower, I don't know how much lower...but isn't that bad if it swings from say 55rh to 69rh?
Reas that big swings are bad.

There is an awful lot of conflicting information for a new grower and im just trying to sift through it all and ask questions.
Click to expand...
lockedshed said:
My 6 inch on setting 9 is sucking hard from the intake hose and blowing hard out of the exhaust.

Im not understanding about the need for an intake fan if my inline is sucking in hard from the lung room?
Click to expand...

Ok man I was looking at that AC trace backwards. Your RH numbers are not bad at all.

If the walls of your tent are sucked in really hard the fan is not getting the full potential of air it could. It's meeting resistance. My exhaust is set to 8 and my intake is 5 when I want negative pressure. You have the dry air you need in the lung room already it's just not making it into the tent fast enough.
 
#20
FWIW, my grow is a little over a week into flower, and it looks like it may be just starting to stretch. I'm growing 4 plants in coco coir, and about a week ago they just started touching the walls of the tent, about when I flipped from 18 hours to 12 hours of light.

Being in coco and getting fed every 2 hours, the plants are growing like monsters. I've been doing a little pruning of the undergrowth, and I take leaves from the large plants trying to overgrow into the smaller ones. I'd previously topped each plant twice.

During veg I added a humidifier and set humidity to 70%. AC Infinity fan set to go full speed around 80F, and with light on, temp usually 83-85f, humidity 67-70%. Air coming into tent is whatever it is in my house in Phoenix, AZ, which is to say it is pretty dry.

And then the lights go out. Temps drop to an amazing 65F (house is set to 76F), and humidity goes as high as 88%. Leaves are dripping a bit of water where they touch each other.

In the past I've added another vent fan running full time. I've also pruned undergrowth to get better flow. My last two coco crops did this as well.

Overall, I like the temp drop, and I worry a bit about molds and the like, so I'm trying to get the RH down to 60-65%. At this stage in the crop I don't need to add humidity.

I do have a small fan running under the canopy and a second small fan blowing on top of the canopy. I'm a bit surprised at the amount of RH spike at night, considering my 6 inch AC Infinity is running at 100% speed, dumping the tent air into the hallway outside the growing room (upstairs bedroom).

All that humidity is putting moisture on all the leaves, which act like evaporative cooling at night. As the plants stretch, and I continue to prune undergrowth, air flow will naturally increase and drop humidity, and turning my humidifier down during the day should also lower the RH at night, if it is running at all during the day. For sure, in the past week my humidifier has been using almost no water.
 
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