anyone seen this kind of spotty madness?

[billiam5]

im totally winging it here 1st timer lookin' for love from deep inside the box... 5 out of 6 seem to be doing well w/ a diet of foxfarm veggie blend 2 tsp. to a gallon of water... and promix hp for my medium... but this one little rascal who i now call spotty like to get these brown spots on the sun leaves usually the big boy leaf... its irritating but like i said im just a beginner who's looking for love.... pics enclosed

 

[Pipe Dream]

Looks like some moisture was on the leaves and it burned it. Try not to let water sit on your leaves, otherwise looks good.

 

[billiam5]

thank you for the quick reply!! i do remember a couple of time i got lazy and dumped water in each cup haphazardly w/ letting there be standing water on leaves...it must of magnified and fried 'em?

 

[blaznboi]

seems about right also make sure if you spray your plamt to have ph balanced water so you dont fry them pare

 

[billiam5]

ok so im still having a problem with this one plant... i know know that the problem must runs deeper... yesterday i transplanted it out of the party cup into a bigger container...left it in the sink for a few hours to recuperate and then back under the veggie lights... got up today and it had WAY more of this browning in its leaves... so i flushed a couple of water loads through the new soil (promix hp) hoping that might help... but really i think i can only prevent more from happening... does promix come pre ferted? and could that be the new problem? or is it some intricate problem genetically? this is my first time under the lights and am so perplexed... heres some pix and thank you in advance for the help! by the way all 5 of my other ones are doing great and none of them are the same strain so this problem seems inherent to this one plant...it comes out new growth rockin' and eventually gets all nasty brown spots and now is even running down the spine of the leaves so that when i look at it in kind of a transparet way through the lights you can see more of the manifestation.... uggh

 

[krok]

Of course it runs deeper, burning from water droplets are a forum-myth.

 

[billiam5]

krok...thats great and all about it being a forum myth but have you seen this issue before and can it be remedied?

 

[Brick Top]

Of course it runs deeper, burning from water droplets are a forum-myth.

Actually it is not a myth and it will be worse if the droplets have fertilizer in them. It is like foliar feeding and overdoing it. Leaves can be burned that way. Just water alone is less likely to cause a problem, and almost a virtual impossibility if using CFLs, but not if using higher wattage HID lighting, then it is possible.

But I don't think that is what he has going on. While it is a rare deficiency it looks like it could possibly be a Boron deficiency. Once reason I think that is possible is one sign of a Boron deficiency is the look of water droplets left on leaves causing burns. Since that is a rare deficiency to have I am not saying it is, but it does look a bit more like it than other sorts of deficiencies.

I wanted to say Calcium at first but it just doesn't look right for a Calcium deficiency, at least not in the second set of pictures that were rather unclear and blurry. Clearer pictures would be helpful.

The question is regardless of what sort of deficiency it is, is it an actual deficiency or one caused by a pH imbalance causing nute lockout?

 

[billiam5]

ok sorry about the bad photos here is another batch of better qualuty pics... im sorry im shitty at taking pics

 

[shannonball]

Brick is right its not a myth about the water droplets on the leaves...especially if the water has fert's... they will burn the leaves.

 

[krok]

I'm talking about WATER on leaves.
It will NOT burn. I have "only" tried with a 600W HPS though.
But I have never tried to make it happen on purpose, nor do I have experience with CFL's very close.

But it's common sense, or physics:

A perfect round ball of glass will focus all rays to a tiny point behind it, which will burn stuff easily.

This is because glass has a higher refraction-index than water, meaning it will focus the rays to a tiny spot.
The higher the refraction-index, the greater the effect.

Water will too, but out of focus - not only because of the lower refraction-index, but because water on leaves are NEVER perfect round balls, which means the focus is even weaker (the light intensity will be lower, and cover more of the leaf).
AND water evaporates before damage.

Also, the constantly moving leaves weakens the effect. (Fans, or outside winds).

edit: Maybe there are special circumstances, 4000 watts, water that somehow does not evaporate, or somehow maintains a nearly perfectly round shape. I guess it can be done, if trying hard enough - maybe with a "weird" environment.
Or maybe I don't define burn the same way as you.


But I stand by my words, it's another forum-myth.
If not, then it must happen so seldom that it's hardly worth discussing.

 

[jack ripa]

Water alone will not burn leaves, especially not with CFLs, come on guys. I have for years sprayed my plants under 1kw lights, even foliar fed in full light and sunlight. I am sorry but please, someone show me some proof of this. What he has looks like a PK def. to me or something.

 

[billiam5]

should we rename this thread water burn? or does someone out there actually know what makes my sun leaves go brown on me?

 

[Brick Top]

Water alone will not burn leaves, especially not with CFLs, come on guys. I have for years sprayed my plants under 1kw lights, even foliar fed in full light and sunlight. I am sorry but please, someone show me some proof of this. What he has looks like a PK def. to me or something.

Are you really going to start up the same thing in this thread as in the other? I am surprised that you asked for proof of something when some of the very information found following one of your links provided the very proof you now as for as if you never heard of it before.

You yourself posted information that said:

Only on some tropical plants with hairy leaves were the water droplets held sufficiently far from the surface to cause burning.

And I posted information that said:

But on leaves with small wax hairs, such as those of the floating fern, the hairs were able to hold water droplets above the leaf surface, creating a magnifying-glass effect that gave the leaves a noticeable sunburn

Cannabis plants have trichomes, as you well know, and they are oily and resinous, as you know, and just as in the information you provided and that I provided said can happen with other plants, water droplets can be suspended above the leaf surface and focus light and cause some degree of burning.

You base your claims on your experience using weak kiddie lighting, using 'Easy Bake Oven" CFL lighting and attempt to rely on that to be proof for HID lighting and growing under sunlight.

There was of course this mentioned in the other thread:

I for one run 2000 watts per square meter 10,000 watts total and yes i have burnt my plants with water i like to keep humidity high in veg i used to foilage spray 2 hrs after lights off but have since stopped it

The very thing you claim to be a; "myth." There is someone running major wattage who has experienced burn due to water droplets.

Why not just be honest and admit the following rather than continuing to spread false inaccurate incorrect information that is only based on your own personal opinion and your own personal belief?

1.) Plants with trichomes can, and at times will, suspend water droplets above the surface of the leaf and under sunlight or HID lighting the light rays can be focused onto a small area and burn the leaf tissue to some degree or another.

2.) Water with fertilizer in it can and will burn leaves if it sits long enough just as you can fry a plant if you foliar feed with too strong of a nute mixture, but it will in the case of water droplets be small isolated 'circles' of burn.

3.) When using CFLs the odds of experiencing burning from water droplets alone is virtually zero due to the weak low intensity lighting, but if there is fertilizer in the water burning is still a possibility since in those cases is it the fertilizer and not the water/light combination that causes the burn.

4.) On smooth leafed plants, like a maple tree, water will shed and there will be no burning.