Wind burn?

[Crom]

I got some week old plants in veg, added a fan today to keep things cool. Is it possible for plants to get wind burn? Does it matter if they're moving side to side (not a lot, 5 mm max maybe)? Does it make them stronger because it simulates wind? Does this affect growth at all?

Thanks.

 

[Bush Grower]

The movement you're talking about, in my opinion, does more good than harm. Wind is a natural variable plants deal with throughout their life, and a form of stress. The stress helps them to build nice strong stems, and (if you are using soil) can also cause the soil to go dry quicker.

I always put a fan on my plants with no problems, sometimes with even more movement than that.... up to an inch. I like to do this so you don't have to worry about the stems breaking under the weight of buds during flowering, and I LST so it makes it less likely for a stem to snap on me while training it because it's stronger.

Hope this helps

EDIT-- More airflow is always helps too, which is another good reason to run a fan.

 

[Crom]

Awesome, just wanted to make sure it wasn't going to harm them. Yes i noticed the soil drying out a lot quicker now too, i'll just have to water more and yes they are in soil.

Thanks for answering my questions Bush

 

[Bush Grower]

No problem man.. good luck!

 

[quadracer]

Wind is great, it's what separates the strong plants from the weak plants. A fan in indoors is not the same thing as the natural wind outdoors, but it does help a lot, especially when the plant is small.

Outdoors though there is a noticeable difference in strength of the plant. There is no comparison.

To answer your question, there isn't such a thing as wind burn but it will evaporate water from both the soil and the plant a lot quicker, as Bush Grower has already said.

Cheers!

 

[Rosy Cheeks]

I was formerly an advert for wind, simply because I believed in copying natural conditions for the plant indoors. Slowly over the years though, I've come to change my mind.
Greenhouses are protected environments where plants thrive. When plants are protected against drastic weather conditions they do much better, and there is no doubt that wind-protected fields give bigger crops than windy spots. There are multiple studies made on wind-effect on food crops, and they show that plants and trees grown in windy areas grow shorter, more robust, and yield less.
I know of no study that focuses on Cannnabis, but it should be the same as all other plants, such as tomatoes.
The "Wind Replenishes CO2" seems logic and sounds good, but in fact enough CO2 circulates without wind. The Sun heats up the ground, which releases CO2. CO2 is heavier than air so it concentrates above the ground, where plants grow. Atmospheric heating and cooling circulate the gases, that is enough.
Fans are good tools to drive out humidity in humid flowerrooms, and maybe they help plants with weak stalks to get stronger, but otherwise you're just wasting energy on making the plants yield less.

 

[Microwido]

Uh, wind burn is bad despite what others have stated here. If part of a plant gets lots of direct wind, the fan leaves will shrivel and its obvious that it is bad for it. That is wind burn.

Air circulation is good of course, it toughens up the plant, allowing the stems to hold up heavier weed, and moves air around which create better breathing for photosynthesis. I am positive a grow room with good circulation will out produce a room with less/none. However if part of a plant gets lots of direct wind, the fan leaves will shrivel and its obvious that it is bad for it and that spot will now produce less nrg/weed.

------------
Good read Rosy, but I know that Co2 is moved around better with air circulation.

 

[Bush Grower]

I was formerly an advert for wind, simply because I believed in copying natural conditions for the plant indoors. Slowly over the years though, I've come to change my mind.
Greenhouses are protected environments where plants thrive. When plants are protected against drastic weather conditions they do much better, and there is no doubt that wind-protected fields give bigger crops than windy spots. There are multiple studies made on wind-effect on food crops, and they show that plants and trees grown in windy areas grow shorter, more robust, and yield less.

Maybe I wasn't clear enough, but I run the fans more during vegetative for stronger stems, and turn it down but still run them during flowering. Therefore since the wind is only strong during veg, you get the same yield as if you had not had a fan running at all.

The "Wind Replenishes CO2" seems logic and sounds good, but in fact enough CO2 circulates without wind. The Sun heats up the ground, which releases CO2. CO2 is heavier than air so it concentrates above the ground, where plants grow. Atmospheric heating and cooling circulate the gases, that is enough.

Outdoors the ground might emit CO2 when heated, but my polyurethane floor doesn't. Most materials used for an indoor grow room don't either.


My 2c

 

[Crom]

I appreciate the replies everyone.

I have them vegging in a small box for stealth reasons. The fan for that size of a box is overkill, but what i did is use a piece of cardboard and put on an angle in front of the fan so the plants aren't getting directly blown on. The air just circulates around and I cut out vents on the top and sides. So it should be OK, and I've had this running for a few days now so I guess if they were getting wind burned I'd noticed and they look fine to me.

Off topic, but on the biggest plant, on one leaf it has slightly curled tips (point up)....is that some nute deficiency?

 

[Rosy Cheeks]

Maybe I wasn't clear enough, but I run the fans more during vegetative for stronger stems, and turn it down but still run them during flowering. Therefore since the wind is only strong during veg, you get the same yield as if you had not had a fan running at all.

That's good, my comments weren't directed at you. Everybody grows according to his own conditions. Fans have their role in growrooms, they drive out excess humidity (important in the flowerroom), they also make things tougher for flying insects. I use them to cool bulbs. What I wanted people to know is that while "strengthening" your plants with wind, you also make them yield less.
If the wind is strong during the veg.phase though, plants will be slightly stunted in growth, and since they're smaller than they would have been without the wind when you flip them, you will loose out on yield that way.

Outdoors the ground might emit CO2 when heated, but my polyurethane floor doesn't. Most materials used for an indoor grow room don't either.


My 2c

True, but it changes nothing on the principle of fluctuating temperature movements; hot air rises, cold air sinks, and gases such as CO2 circulate that way. There may not be any CO2 coming from your plastic floor, there are some coming from pots with soil and coco in them, but it's beside the point.

 

[McSnappler]

Hi Guys, sorry to pull up an old topic, thought it was better than starting a fresh one.

I've just moved some seedlings, and a small mother plant, to a tiny box I built. The plants wilted a bit, and at first I put this down to a feeding issue. Thing is, the seedlings I left out of the box are doing fine, despite having the same feeding regime as their siblings.

The box is only 70cm x 30cm x 20cm, but I'm running an 85cfm case fan to keep the 110W of PL-L CFLs cool.

The airflow is causing the seedlings to bob about a fair amount. At first I thought great, no need for a circulating fan to strengthen the stems, but now I'm worried, and increasingly sure, that they're drying out from the sheer volume of air moving through the box.

Some info on this thread seems to confirm what I thought.. They're losing more moisture through the leaves than they can take up through their limited root mass?

In a bit of a quandry, as if I cut the fan speed right down, the box will heat up massively.

For now, I've duct taped up some of the inlet area which was directly impacting on the plants, to see if there is any improvement.

 

[McSnappler]

12 hours later, they're much better.

 

[TrueReligion]

I understand that this is an older post. My apologies.

I understand that this is an older post. My apologies.

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