Do fans hurt your plants?

ryan1918 · Dec 19, 2015

I'm curious if you think thats can hurt your plants, I normally just have a little bit blowing on them until they get bigger and keep doing more, sometimes though I don't blow directly on it, and then for a day I'll put direct fan on it to make it stronger, but do you think it ever slows down growth, and don't you think making it very strong even if it doesn't grow much is good or would just not really using any fan and scrogging be just as effective?

Someone mentioned wind burn I've never seen it or heard of it, but I do know i've had some plants in previous grows were a fan was directly on it and it seemed to not grow very much maybe it was just getting stronger

sanjuan · Dec 19, 2015

I don't subscribe to the idea that plants need to be blown around to become strong.
I very definitely have hurt plants from too much air flow, even humid air flow coming out of a humidifier.

Elmo's Closet · Dec 19, 2015

I believe constant harsh wind can be harmful but an oscillating fan applying a constant breeze shouldn't cause any harm.

whitebb2727 · Dec 19, 2015

Some of my best buds have been from the closet to the fan and the hardest blown on.

elephantSea · Dec 19, 2015

Ive noticed that too. some of the frostiest nugs are the one's closest to the fans, But you just need to watch your temps and humidity with fans blowing all the time. You can start developing bud rot if the temps drop too low and the humidity is high enough.

whitebb2727 · Dec 19, 2015

elephantSea said:
Ive noticed that too. some of the frostiest nugs are the one's closest to the fans, But you just need to watch your temps and humidity with fans blowing all the time. You can start developing bud rot if the temps drop too low and the humidity is high enough.

You should watch for bud rot if temps are low and humidity high anyways.

I'm not sure how the fan would make a difference. On the one hand it could help dry the bud to prevent rot, on the other it could spread spores.

THE KONASSURE · Dec 19, 2015

just get a bit more uv in your light spectrum or blast them with a uvc lamp for 1min to 15 mins per day, that`ll kill a lot of the spores if you have any

I tried running very low temps on a grow for a while I hoping the colder temps would lead to better tasting bud, but it seems that cool nights late in flower is all you really need

Yeah more airflow normally means better bud

but I`ve seen a fan`s force damage a plant or they grow into it and get hit by the blades

Some people get "wind" damage on their leaf but I`ve never noticed any personally

Gquebed · Dec 19, 2015

There is something called VPD vapour pressure deficit that fans can create or make worse...

If you grow in low humidity conditions...to much air movement can worsen the problem.

You know you are suffering vpd if your fan leaves start to "canoe"...curl upwards making a canoe shape in the leaf... AND if they appear wrinkled... you will also find drops of moisture on the leaves for no apparent reason.

The canoeing makes the problem look like heat stress, but if that comes with the moisture drops and the wrinkled leaves then you know its vpd.

Solution is to up your humidity or simple turn down the fans...

All it is... is the air movement is too much and the plant is transpiring too hard for low humidity conditions....

Ive had to fight through this a couple times to dial in my room set up

Diabolical666 · Dec 19, 2015

whitebb2727 said:
Some of my best buds have been from the closet to the fan and the hardest blown on.

lol to true...my outdoors gets upto 50 mph gusts...I call em beef castles bc they are strong. My golden goat hates the wind initially...she gets all freyed, then slowly snaps out of it and beefs up

az2000 · Dec 19, 2015

ryan1918 said:
Someone mentioned wind burn I've never seen it

I'm in a dry climate. If I blow directly on leaves too strongly, too long, sativa leaves will crinkle and taco. Indica leaves will buckle, be irregular. I'm growing one now that suffered a little. The fan wasn't even blowing directly on it, just bouncing off a wall (even on a slower speed!).

The proper solution for me is to use a humidifier. I squeak by without it, but i have to be careful with wind.

whitebb2727 · Dec 19, 2015

az2000 said:
I'm in a dry climate. If I blow directly on leaves too strongly, too long, sativa leaves will crinkle and taco. Indica leaves will buckle, be irregular. I'm growing one now that suffered a little. The fan wasn't even blowing directly on it, just bouncing off a wall (even on a slower speed!).

The proper solution for me is to use a humidifier. I squeak by without it, but i have to be careful with wind.

I've had that happen to me. When started young with wind and they do that they grow out of it.

What's your grow room rh?

az2000 · Dec 19, 2015

whitebb2727 said:
I've had that happen to me. When started young with wind and they do that they grow out of it.

What's your grow room rh?

20-22% I spread out a wet towel when I think of it.

It happens when their large plants too (tacoing, stressed looking).

whitebb2727 · Dec 19, 2015

az2000 said:
20-22% I spread out a wet towel when I think of it.

It happens when their large plants too (tacoing, stressed looking).

Yea, that's low. A bucket of water would last longer. Put the towel in it and let it hang over the side.

ryan1918 · Dec 19, 2015

what about intake and outtake fans, I'm currently vegging and have a small cheap duct fan running every 2-3 hours for 30 mins I don't have a outtake I figure my furnace and leaks will exhaust it should I put one in? also how do you know how often to run it?

Indagrow · Dec 19, 2015

I used to have issues with it till I installed two of these units.. My ladies love it

Gquebed · Dec 19, 2015

ryan1918 said:
what about intake and outtake fans, I'm currently vegging and have a small cheap duct fan running every 2-3 hours for 30 mins I don't have a outtake I figure my furnace and leaks will exhaust it should I put one in? also how do you know how often to run it?

4" inline at about 120cfm for exhaust to outside
6" inline fan at about 240 ish cfm for intake of fresh outside air into the room
Put them on the same timer for 15 mins every hour for a 5x9 space

Works great.

Buzzzz · Dec 20, 2015

ryan1918 said:
I'm curious if you think thats can hurt your plants, I normally just have a little bit blowing on them until they get bigger and keep doing more, sometimes though I don't blow directly on it, and then for a day I'll put direct fan on it to make it stronger, but do you think it ever slows down growth, and don't you think making it very strong even if it doesn't grow much is good or would just not really using any fan and scrogging be just as effective?

Someone mentioned wind burn I've never seen it or heard of it, but I do know i've had some plants in previous grows were a fan was directly on it and it seemed to not grow very much maybe it was just getting stronger

Go to obx this time of year, u'll know what it is....

sanjuan · Dec 20, 2015

Obx for those of us on the other side of the country:
https://www.outerbanks.org/outerbanks-when-to-visit/

Do fans hurt your plants?

ryan1918

Well-Known Member

sanjuan

Well-Known Member

Elmo's Closet

Active Member

whitebb2727

Well-Known Member

elephantSea

Well-Known Member

whitebb2727

Well-Known Member

THE KONASSURE

Well-Known Member

Gquebed

Well-Known Member

Diabolical666

Well-Known Member

az2000

Well-Known Member

whitebb2727

Well-Known Member

az2000

Well-Known Member

whitebb2727

Well-Known Member

ryan1918

Well-Known Member

Indagrow

Well-Known Member

Gquebed

Well-Known Member

Buzzzz

Well-Known Member

sanjuan

Well-Known Member

Similar threads