Help! is this wind burn?

F

Fairmont

Member
Hi people, A friend of mine has done a few grows and he has started having a problem with some of his leafs/leaves?
He thinks it may be wind burn as it seems to be happening to the plants by the fan in the room. The pic of the tent is looking in the door, he has the fan by the door just below the shot. there is a close up of one of the tops (uneffected) and some of the damaged leaves/leafs that have been removed.

Any ideas?

Mold or fungus?
 

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F

Fairmont

Member
Also, it is certinly not nute burn (water only so far). Pics taken yesterday at 5 weeks just changed to 12/12 today.
 
T

Troyzkoi

Active Member
I had a few plants growing in throwing distance from the Pacific last year outdoors, and it does look similar to the wind burn problem that I had inticipated... The wind blows strong where I'm at...
 
bird mcbride

bird mcbride

Well-Known Member
Fairmont said:
Gee thank you for the constructive advice!
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I think it's funny too. Are you using one of those wind cyclone2000 blowers? Looks like they got to damp. Are you using ventilation and what are you growing them in? It's not an alien organism, it's just the tip of the leaves died a little. Somehow your plants got a little root damage.
 
F

Fairmont

Member
bird mcbride said:
I think it's funny too. Are you using one of those wind cyclone2000 blowers? Looks like they got to damp. Are you using ventilation and what are you growing them in? It's not an alien organism, it's just the tip of the leaves died a little. Somehow your plants got a little root damage.
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extractor running from 4am till 1am, had wilt 5 days ago so upped the water. soil is a mix of organic compostand potting mix. about 50% humidity and peaking at 82f at the canopy. have had the fan blowing directly on them trying to strenghten them for the weight gain. Just started food today. been in those post for the 5 weeks. no changes to anything.
 
bird mcbride

bird mcbride

Well-Known Member
Fairmont said:
extractor running from 4am till 1am, had wilt 5 days ago so upped the water. soil is a mix of organic compostand potting mix. about 50% humidity and peaking at 82f at the canopy. have had the fan blowing directly on them trying to strenghten them for the weight gain. Just started food today. been in those post for the 5 weeks. no changes to anything.
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When using ventilation make sure that you don't produce negative air(vacuum) pressure in your grow. Your room must be of equal or greater air pressure. The biggest reason for this(I grow in the Rocky mountains) is fertilizer reacts quiker in lower atmospheric pressures(higher altitudes) and will cause your plants to experience difficulties. Using a small fan and a venttube direct your canopy air at or under(if possible) your rootbed . Never go full strenth on your fertilizer because marijuana is a weed. Many potting soils come prefertilized as well as pre-ph balanced.
 
F

Fairmont

Member
bird mcbride said:
When using ventilation make sure that you don't produce negative air(vacuum) pressure in your grow. Your room must be of equal or greater air pressure. The biggest reason for this(I grow in the Rocky mountains) is fertilizer reacts quiker in lower atmospheric pressures(higher altitudes) and will cause your plants to experience difficulties. Using a small fan and a venttube direct your canopy air at or under(if possible) your rootbed . Never go full strenth on your fertilizer because marijuana is a weed. Many potting soils come prefertilized as well as pre-ph balanced.
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Arrr, I think this may be it! Cheers!!
 
CanadianDank

CanadianDank

Well-Known Member
bird mcbride said:
When using ventilation make sure that you don't produce negative air(vacuum) pressure in your grow. Your room must be of equal or greater air pressure. The biggest reason for this(I grow in the Rocky mountains) is fertilizer reacts quiker in lower atmospheric pressures(higher altitudes) and will cause your plants to experience difficulties. Using a small fan and a venttube direct your canopy air at or under(if possible) your rootbed . Never go full strenth on your fertilizer because marijuana is a weed. Many potting soils come prefertilized as well as pre-ph balanced.
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I know this is really old, but could you point me in the right direction to to learn more about negative air pressure.. I have a 4x4 tent with passive intake and its like a vacuum when I put my hand near the intake vent.
 
Sureshot2

Sureshot2

Well-Known Member
CanadianDank said:
I know this is really old, but could you point me in the right direction to to learn more about negative air pressure.. I have a 4x4 tent with passive intake and its like a vacuum when I put my hand near the intake vent.
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I have never heard of anyone keeping positive pressure in their tents like he suggests. If you are using a carbon filter you will most certainly need to maintain at least a very slight negative pressure to ensure smell doesn't leak. If you are using a passive intake and the vacuum is too great consider adding additional intakes. I can't give you too much advice on that though as I use an active intake.
 
CanadianDank

CanadianDank

Well-Known Member
Sureshot2 said:
I have never heard of anyone keeping positive pressure in their tents like he suggests. If you are using a carbon filter you will most certainly need to maintain at least a very slight negative pressure to ensure smell doesn't leak. If you are using a passive intake and the vacuum is too great consider adding additional intakes. I can't give you too much advice on that though as I use an active intake.
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Yea I thought it sounded iffy, I'd always heard I should maintain a slight negative pressure.
Although lately I've been thinking of hooking up my 4 inch for an active intake.

Thanks for th response man
 
CanadianDank

CanadianDank

Well-Known Member
20170904_163056.jpg

Having problems positioning my circulation fans effectively, seems my tower oscillating fan blows a bit hard
 
Sureshot2

Sureshot2

Well-Known Member
CanadianDank said:
View attachment 4005871

Having problems positioning my circulation fans effectively, seems my tower oscillating fan blows a bit hard
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Everything looks good, ime it's almost impossible to have too much circulation in your tent - this is not to be confused with ventilation though, you can definitely be recycling air too much. I have never experienced wind burn from fans within my tent, and I keep 2 6" oscillating fans above the canopy, and one large 8" fan below blowing up at the canopy (literally less than a foot from the leaves on high speed) in each of my 2x4 tents.

The only time I have experienced wind burn like symptoms was from having super dry winter air blowing on one of my plants from the active intake. As long as you have good temps and humidity in the tent, you should have no problem with your circulation fans, even if they are blowing hard or close to the leaves.
 
CanadianDank

CanadianDank

Well-Known Member
Sureshot2 said:
Everything looks good, ime it's almost impossible to have too much circulation in your tent - this is not to be confused with ventilation though, you can definitely be recycling air too much. I have never experienced wind burn from fans within my tent, and I keep 2 6" oscillating fans above the canopy, and one large 8" fan below blowing up at the canopy (literally less than a foot from the leaves on high speed) in each of my 2x4 tents.

The only time I have experienced wind burn like symptoms was from having super dry winter air blowing on one of my plants from the active intake. As long as you have good temps and humidity in the tent, you should have no problem with your circulation fans, even if they are blowing hard or close to the leaves.
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Thanks man you've eased my mind for sure.
I'm pretty sure you're right and it's not windburn at all. I was seeing some dry crispy edges of some of the larger fan leaves, and had just recently repositioned my fans to blow more directly at my plants and made a bad assumption.
They're looking decent today though so I'm not worried.
Thanks again!
 
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