Do I need to put my fan on a timer?

U

user192021

Well-Known Member
Probably a dumb question, but I ran a search and couldn't find any prior threads addressing this.

I bought an oscilating fan and have it on a low setting, blowing on my plants - should I just leave this on all the time or should I put it on a timer?
 
H

hobo80

Well-Known Member
I would leave it on 24/7, leaves use up the co2 around them pretty fast. You want to keep the air moving.
 
lizzardking

lizzardking

Well-Known Member
i leave my fan on for the light period and turn off at night its on the same timer as the lights mostly use if for heat issues with my grow.
 
H

hobo80

Well-Known Member
You could just have it on when your lights are on. The reason I don't do that though (besides that I want to keep the air moving), is because when your lights go off, your humidity goes up...
 
TheFaux

TheFaux

New Member
hobo80 said:
You could just have it on when your lights are on. The reason I don't do that though (besides that I want to keep the air moving), is because when your lights go off, your humidity goes up...
Click to expand...
.... but humidity isn't a problem unless temps are way low or plants are in late flowering. ;-) Under ideal conditions, humidity would be quite high.
 
L

lowryderrocks

Active Member
I leave my oscillating fan on 24/7 and its turning 24/7, I have my intake and exhaust fan on for 15mins every hour when lights are off, and on constant when lights are on.
 
TheFaux

TheFaux

New Member
hobo80 said:
If it's oscillating, you can blow it on the plants, as long as it's turning.
Click to expand...
If it's not oscillating, you can blow it on the plants..... doesn't mean it's a good idea.

You'll want high humidity if you just absolutely have to blow on your girls; otherwise you're gonna stress them and dry them out.
 
H

hobo80

Well-Known Member
TheFaux said:
.... but humidity isn't a problem unless temps are way low or plants are in late flowering. ;-) Under ideal conditions, humidity would be quite high.
Click to expand...
You are correct. However, regardless of humidity, you want to keep the air moving. Plants use all co2 around the leaf within a few minutes. When it's not replaced with new co2 enriched air, a dead air zone forms around the leaf and stifles the stomata and slows growth. If the air doesn't move, it stratifies.
 
panhead

panhead

Well-Known Member
There is no reason to ever shut the fan off infact there are several compelling reasons that dictate leaving it on 27/7,the most important reason being air circulation,the biggest enemy of mold & other fungi is fresh air,constant air flow is crucial for a healthy room to stay healthy,the better the circulation you have the higher humidity levels your plants will be able to withstand while they are in heavy bud,this is the best way to protect against bud rott.

Constant air flow is also the best natural pest control,spider mites do not like fast moving air & find it next to impossible to gain a foothold in a grow op that has great air circulation within all areas of the grow.

A constant & steady air stream blowing on all areas of the entire plant is also the best way to gain increased stalk & stem strength,the constant pushing & pulling on the plants increases the overall structurall strength of the plants,this becomes very important in heavy budding.

The only times i shut my fans off is in the odd times when i need to correct a problem with a foliar spray,then i shut them down so the plants can absorb what they need,after they are 100% dry then i turn the fans right back on.

Not only should you leave the fan on 24/7 but you should increase the strength of air flow blowing all through the canopy,as the plants build a heavier structure to deal with the windy conditions you should increase air flow over & into the canopy,by the time your in heavy bud production the plants can withstand maximum air flow without any damage,mold,spider mites,powdery mildew & bud rottt become much more of non issues at that point.
 
TheFaux

TheFaux

New Member
hobo80 said:
You are correct. However, regardless of humidity, you want to keep the air moving. Plants use all co2 around the leaf within a few minutes. When it's not replaced with new co2 enriched air, a dead air zone forms around the leaf and stifles the stomata and slows growth. If the air doesn't move, it stratifies.
Click to expand...
I feel ya brother. That's why I aim my fans at the ceiling or lamp.... or just rely on a carbon filter and extractor fan. Also the convection of the lamp could be enough to keep air moving across the leaves. The leaves don't even have to be moving to be getting CO2.
 
panhead

panhead

Well-Known Member
TheFaux said:
If it's not oscillating, you can blow it on the plants..... doesn't mean it's a good idea.

You'll want high humidity if you just absolutely have to blow on your girls; otherwise you're gonna stress them and dry them out.
Click to expand...
This is complete nonsense my friend & needs to be checked,im not one to refute others advice but when it's just plain bad advice such as the above it needs checked.

The conditions you state as being bad are as close to a natural growing condition that can be replicated within a enclosed area,infact every expert grower ive read up on highly reccomends air flow into the canopy to keep the plants moving at all times,some well established growers go as far as to strongly reccomend having a constant & steady air flow comming from under the plants at all times.

These pics are of a room with heavy air circulation,the room is 12 ft x 14 ft,in 3 corners of the room are 3 18 inch oscalating fans set on the highest setting,these 3 fans are timed to oscalate at the same time ,which in turn makes the canopy look like a wave on water when the air flow makes its pass,each fan blows from a different height reaching it's air stream into different levels of the plant mass,all leaves are constantly being blown,the 4th & largest fan is a heavy duty 24 inch air circulation fan set to keep temps equal at all levels of the room.

As you can see from the pics the plants are healthy & far from being dried out,these plants have only been foliar fed one time 2 weeks ago & have never been misted with plain water.

Oscalating fan #1 set on high.



Oscalating fan # 2 set on high also & digging deeply into the canopy.



Heavy duty air circulation fan set on low,this fan will increase in speed durring budding until its on high mode,the oscalating fan in corner # 3 is not shown.



Healthy canopy being blown in heavy breeze 24/7 for 3.5 weeks straight.



Stem structure of 3.5 week old plants.

 
Emerald Isles

Emerald Isles

Active Member
it's probably the only items within my grow room that hasn't been switch off in over a year, i reduce the speed at night after lights out but that's about it.... i always make sure there is air movement 24x7
 
barrgemike

barrgemike

Well-Known Member
I keep my two fans on high during the day, and at night i turn one down to med to move air around the plants, and then leave one on high to push air out or the room.


:peace:
 
iloveit

iloveit

Well-Known Member
panhead said:
This is complete nonsense my friend & needs to be checked,im not one to refute others advice but when it's just plain bad advice such as the above it needs checked.

The conditions you state as being bad are as close to a natural growing condition that can be replicated within a enclosed area,infact every expert grower ive read up on highly reccomends air flow into the canopy to keep the plants moving at all times,some well established growers go as far as to strongly reccomend having a constant & steady air flow comming from under the plants at all times.

These pics are of a room with heavy air circulation,the room is 12 ft x 14 ft,in 3 corners of the room are 3 18 inch oscalating fans set on the highest setting,these 3 fans are timed to oscalate at the same time ,which in turn makes the canopy look like a wave on water when the air flow makes its pass,each fan blows from a different height reaching it's air stream into different levels of the plant mass,all leaves are constantly being blown,the 4th & largest fan is a heavy duty 24 inch air circulation fan set to keep temps equal at all levels of the room.

As you can see from the pics the plants are healthy & far from being dried out,these plants have only been foliar fed one time 2 weeks ago & have never been misted with plain water.

Oscalating fan #1 set on high.



Oscalating fan # 2 set on high also & digging deeply into the canopy.



Heavy duty air circulation fan set on low,this fan will increase in speed durring budding until its on high mode,the oscalating fan in corner # 3 is not shown.



Healthy canopy being blown in heavy breeze 24/7 for 3.5 weeks straight.



Stem structure of 3.5 week old plants.

Click to expand...
Thank you for giving us the reality on this topic. I was planning on purchasing 3 extra fan which would have been useless because my grow cabinet has been designed specifically so that air flows from underneath the plant in all compartments.
 
panhead

panhead

Well-Known Member
TheFaux said:
When you guys are growing 5 lb. trees indoors I'll care what you have to say; until then we can bow down to Krusty and his buckets. :bigjoint:


http://www.icmag.com/ic/showthread.php?t=249http://www.planetganja.com/highsociety/attachment.php?attachmentid=99560&stc=1&thumb=1&d=1176951767

http://www.planetganja.com/highsociety/showthread.php?t=16127

http://www.planetganja.com/highsociety/showthread.php?t=11139
Click to expand...
Growing 5lb trees is no greater feat than growing a SOG or any other high yeild style,its more preference than skill level.

Instead of being insulted you should back up your advice,advice which goes directly against the growing process in nature & whats reccomended by most recgonized commercial master growers.

For those of us who dont want to read through multiple monster threads to find out what your talking about please tell us,its all part of the diuscussion & learning process,if it makes sense i'll try it & see how it goes,im sure others will as well.
 
You must log in or register to reply here.
Top