Why not blow fan directly on plant?

snowdog203

snowdog203

Well-Known Member
I see lots of advise saying don't blow fan on plant but don't understand why not. With out the fan on the plant the heat rises fast. I am at my limit for room mods and equipment, so rather than changing, that is unless my plant rebels, I am just looking for the thinking behind why this is a much touted bit of advise.
 
Got me. I've never thought of wind being a detriment in nature or when being recreated indoors. In fact, I would say good airflow would be beneficial in helping plants transpire (and more easily draw up water/nutrients), especially in humid conditions.
 
i think the reason they say not to have a fan directly on the plants is because itll mess up your sprouts..........or maybe itll dry out your leaves
 
What Stoney said- it helps beef up the stems.

Maybe they were talking about the hanging buds to dry? You don't want a fan blowing directly on those...
 
^I agree with all you guys, but have to add one warning....


....I've had this happen, and it took me a handful of grows to figure out. I run my humidity a little lower than alot of guys, and also used to run my temps quite high(around 85-90*), with a oscillating fan going constantly. Well, it took me forever to figure out why my plants on the outer edges would get "the claw", like a nitrogen overdose, even though I knew they weren't overfed. Then I thought it was something to do with the light being weaker around the edges...wrong.lol Finally, I realized that they were in the exact spot where the fan stopped, before changing direction, and as mentioned, they over-transpired(if that's a real word.lol), and ended up looking claw-like. It didn't effect all the strains, either, just the Crystal, which made it more confusing. Well, I moved the fan a little, and the problem has never come back. So, my only conclusion, is that it was indeed, the cause of the problem. Whoulda thunk it? :wink:
 
KuLong said:
This goes against everything I personally believe in. Do you have any links that you got that advice from?
Click to expand...

" Keep the air circulating with fresh air. Do not 'blow' the fans directly on the plants for extended periods... blow the air 'around' the cannabis plants. They require the fresh air exchange." http://www.weedsthatplease.com/flowering.htm

Thanks all, yeah I echo your sentiments.
I am a noob so thought I'd ask, kinda hoping against my own instinct that I'd learn something new about transpiration and nature's processes. (I also got info off the net about the pollen not storing for more than a couple weeks, I recently pollinated and have seeds growing with some pollen stored/aged a year. The pollen storage opens up some doors for me, hybridization, non-concurrent grows etc...)
 
KuLong you got me! i tried to kill that bug on my screen! LOL!
Blowing fans on your plants is benifical to a point, if your temps are high and your humidity low it will cause the stoma on your leaves to close slowing resperation rates and growth and causing wind burn in exstream cases. I always have occilating fan 24/7 on mine with no probs. Within reason it helps plants transpire and moves more Co2 to help photosythenis. My opion they got to move those branches to make them strong enough to hold heavy buds
 
I personally do not like blowing fans on my plants.

I believe you should try to make the plants dance a little with wind movement.

If you need to then position your fan directly at your light rather than directly at your plants.

If you direct it straight at the plants this can cause low humidity on your leaves which can cause things such as wind burn and leaf curl.

I would recommend directing the air from fans directly at your light if you need to remove the heat from the lamp. Or better yet go air cooled.


J
 
Its called windburn. It almost looks like you have a pest problem but it happens when your leaves consantly blow against another leaf and the serated edges of the leaves cut the new soft gowth.
 
A fan will make the plant transpire alot more water, i use it to harden the stems and help dry soil thats very wet.

Oh it also helps keep the air fresh , keeps the heat even an distribute CO2 witch settles in the bottom of a cab.
 
I tried that shit on 100 clones and left for the weekend came back and had a 100 dead clones FYI they were actual plants either way they died cause of the fan which was 4.5 feet away. I would just do it for 30 minutes on 30 minutes off now they i have that problem
 
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