Myth Busters Cannabis Edition

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Bacala

Well-Known Member
Just read yet another caution here that wetting your plants in the daylight will cause leaf burn because the drops act like little magnifying glasses. I'm an avid gardener and have been using various forums as long as they've been around and this one just keeps coming up.

It doesn't happen, period. I know of one scientific paper that states that with leaves of a certain texture, with hairs that will keep the drops standing above the leaf surface at just the right height and with perfect sun exposure, some burn is possible. For us in the real world, it doesn't happen.

Tuesday it was 102deg here, and yesterday was 104deg. At about 10:30am on both days, with temps already in the 90s and full, direct sunlight I watered and sprayed my plants. Below are pics taken today clearly showing the leaf surfaces. You'll notice no burn.

If this myth was true, wouldn't we all get tiny burns if we come out of the pool and stand in the sun? Water drops are not magnifying glasses, and it just doesn't happen.

leaves1x.jpg

leaves2x.jpg
 
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Aussiedwc

Member
I agree with you I grow under led for veg and hps for flower temps in the mid 80s and spray plants twice a day just after lights come on and then half hour before off never had burnt spots
 
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Aussiedwc

Member
Well if you have a myth you need busted post it here I've got some bagseed clones in tent taking up some excess light :D
 
ebcrew

ebcrew

Well-Known Member
only one i can think of that i havent already debunked myself 100% is defoliation.. Ive tried a few times and really havent seen anything either way. Im not talking about a new grower destroying 80% of his plant, i mean just defoliating for instance in the beginning of flowering to make light for bud sites, especially when using CFLs which lack penetrating power. However, I think this topic will always be up for debate and can never be debunked.
 
T

T.H.Cammo

Well-Known Member
I've said it before and I'll say it again. Aluminum foil does not cause hotspots. It would need to be crinckled-up, and the majority of the the facets would have to be "focased" to cause a hotspot. I'm not saying it's impossible - what I am saying is, the chances are like winning the "Lottery" (only in a bad way)!

It's just one of those things that "sounds" like it makes sense and keeps getting passed along - even though it's never happened to anybody!
 
Big Trees

Big Trees

Well-Known Member
Indoors is what they are talking about with the water burning the plants. Outdoors they using misting fans all the time at nurseries and greenhouses, so I suppose its alright lol. Now misting with your lights on is an issue because the cold water hitting the hot light can cause it to crack/explode
 
caherbgrower

caherbgrower

Well-Known Member
I've used a bag with water in it to start a fire like you would with a magnifying glass. So droplets can in fact concentrate sunlight. However, it was very difficult to start the fire. It took a lot of adjusting and patience to do it. I've never seen foliar damage from water droplets though. But I think if the plant weren't moving from the wind at all and the light lined up just right, it could happen.
 
rob333

rob333

Well-Known Member
Bacala said:
Just read yet another caution here that wetting your plants in the daylight will cause leaf burn because the drops act like little magnifying glasses. I'm an avid gardener and have been using various forums as long as they've been around and this one just keeps coming up.

It doesn't happen, period. I know of one scientific paper that states that with leaves of a certain texture, with hairs that will keep the drops standing above the leaf surface at just the right height and with perfect sun exposure, some burn is possible. For us in the real world, it doesn't happen.

Tuesday it was 102deg here, and yesterday was 104deg. At about 10:30am on both days, with temps already in the 90s and full, direct sunlight I watered and sprayed my plants. Below are pics taken today clearly showing the leaf surfaces. You'll notice no burn.

If this myth was true, wouldn't we all get tiny burns if we come out of the pool and stand in the sun? Water drops are not magnifying glasses, and it just doesn't happen.

View attachment 3452674

View attachment 3452675
Click to expand...
well there no adam or jamie here so it aint myth busters
 
rob333

rob333

Well-Known Member
Bacala said:
Just read yet another caution here that wetting your plants in the daylight will cause leaf burn because the drops act like little magnifying glasses. I'm an avid gardener and have been using various forums as long as they've been around and this one just keeps coming up.

It doesn't happen, period. I know of one scientific paper that states that with leaves of a certain texture, with hairs that will keep the drops standing above the leaf surface at just the right height and with perfect sun exposure, some burn is possible. For us in the real world, it doesn't happen.

Tuesday it was 102deg here, and yesterday was 104deg. At about 10:30am on both days, with temps already in the 90s and full, direct sunlight I watered and sprayed my plants. Below are pics taken today clearly showing the leaf surfaces. You'll notice no burn.

If this myth was true, wouldn't we all get tiny burns if we come out of the pool and stand in the sun? Water drops are not magnifying glasses, and it just doesn't happen.

View attachment 3452674

View attachment 3452675
Click to expand...
it all depends on the size of the water drops i mist the shit out of my outdoors and indoors with lights on with no issue's but if i spray with heavy drops that sit on the plant well u will get a burn spot
 
whitebb2727

whitebb2727

Well-Known Member
It can burn. Had some rain pop out mid day right before the rain and cool air moved in. Close to 100 outside when it happened. Burnt a couple pretty bad.
 
HolyGhost23

HolyGhost23

Well-Known Member
ash burning white.. i dont know wtf retarded stoner came up with that bullshit.. anything dry will burn up most of the carbon in something and leave white ash. regardless of chemicals in the product.. science people.. use it.. and flushing..i don't know about you guys. but in nature and farming they dont flush out before a harvest. maybe make it lighter on nutes.. but soil. in the ground always has some nutes in it. and that whole going by the leaves turning yellow.. they turn yellow because your starving them not because they are getting ready like its fall.... common people did you ever even take one biology course at all?. i really hope they make the shit legal so real scientists can study the plant and put bullshit and stupidity to bed.
 
HolyGhost23

HolyGhost23

Well-Known Member
whitebb2727 said:
Some only 10 hours of darkness are needed. Mainly indicas. Try it on a grow. Reduce day hours over time I stead of an abrupt change to 12/12. Quite a few will flower at around 14/10.
Click to expand...
this actually works well with most photos, though i find some sativa's wont flower until 12/12, that's just personal experience though.
as for 10/14.. im not sure if it speeds it up or just hinders growth.

and for auto flowers. if they are being a bit retarded with flowering ,sometimes lowering the day to 16 or 14 will get them to kick in , most of the time you can go back to 18/6 but if you wanna be save you can stick with 16/8
 
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