Will my plants get powdery mildew? extremely crowded ScroG

Funkateer

Member
I am worried about my ScroG for being way too crowded, It's not my 1st Scrog, and in the past all went without problems, but I think it never really went that crowded in the other scrogs...

what worries me is the high number of leaves overlapping, touching buds.. etc..

here a Picture of it without me going through the leaves with my hands:
2.JPG



after moving the leaves (see the wet spots ) 3.JPG

and I did not even move every single leaf, there are plenty of other leaves touching each other...
they are transpirating like crazy,


here's a picture from above, to illustrate the level of "crowdedness"
1.JPG



I know defoliating is highly criticized, removed a few leaves, but not many.
another thing I could do, is to spray canna cure, have a bottle of this laying around. they say it prevents powdery mildew, but it would def. get on all the buds too....

should I defoliate? what do you guys think? (would be nice to hear some scroggers who know what they're talkin' about:)

it's about day 15 into flower and I 'Ive got a honeywell fan blowing right under the bulb.... should make plenty of air circulation... but still everything is touching...
 
Last edited:

cannn

Well-Known Member
Personally i wouldve probably done some trimming on those. Just wherever i see leaves overcrowding and pushing against each other and causing spots for potential issues. I wouldnt spray anything on my flowering plants. I dont often scrog but i do usually have an overcrowded cab

Edit: greencure seems fine from what ive read now, thanks tim!
 
Last edited:

Johnei

Well-Known Member
The moisture between leaves is bad. I think you know what you have to do.

Think about when fat moist buds are all packed in there also in near future.

extra suggestion: think about installing a filter on the incoming air; minimize chances of mold spores.
 

Johnei

Well-Known Member
Increase airflow through room dropping RH levels, and watch night time RH levels especially.

--Increase oscilating fan movement power of the leaves so they are constantly in motion and less moist sticky touching of leaves, and also more oscilating fan air movement will kill that moisture in the first place.
 

Johnei

Well-Known Member
if you have stationary fan only, pumping in one direction never changing, this is like having a group of people standing in a wind tunnel being thrown back all squished together against the wall. dead spots form between people squished. LOL if ya know what i mean. need oscilating fan blowing back n forth making leaves wiggle and flick around in all directions/exchanging air/co2 locally right at the leaf.
 

NrthrnMichigan

Well-Known Member
Did you remove all foliage below screen? I found that running an oscillating fan below the screen level with all foliage removed (below screen level) will increase air flow and greatly reduce the chance of PM. Air circulation and controlling RH is crucial in reducing chance of the blight. I have not had pm since I started scrogging about 4 years ago. I go as far as removing all weaker or smaller shoots (branches) that do not reach the canopy. I also remove the thin spindly branches that do reach the canopy (thinning out the canopy) to create more airflow and also allow the light to reach down to the net. This also allows the plant to focus on the bigger bud sites producing bigger colas instead of wasting the energy to create larf.
 

Funkateer

Member
yeah but in my tent it's not an high humidity problem, it also doesn't happen at night, no wet spots in the morning.
it's when leaves transpiring a lot especially when lights are on, due to heat for example...

the idea with the fan blowing below the canopy seems like a good idea...I think I'll try that,
leaves are also dropping the last few days like crazy, don't know if its N deficiency or just the plant dropping what doesn't get light... picking up 20 leaves every day now under the canopy...
bud production is really fast this time.

something about my fan: its a Honeywell 30 watts or something, blows pretty good, I let it blow right through the heat, below the lamp, it also blows against the walls of the tent so I think the circulation is there, but it's more passive.. and doesn't shake leaves very much..

I think I'll defoliate some more today.. and get a fan to blow air below the canopy

I appreciate your help dudes :)
4.JPG
5.JPG
 

cannn

Well-Known Member
If its dropping a lot of lower leaves and theyre yellowing overall starting at the bottom leaf and working up the plant its n deficiency. ime plants dont really decide they dont need leaves. If they can keep them they do. Not that it isnt good to let them get some n def at the end. Just now might be a bit early. I like to make sure they have plenty of n through at least the first 3 weeks of flower and lower it after that
 

Johnei

Well-Known Member
In this pic above of diseased deficient plants, there are about three spots that don't have a top and ruin your bud grid matrix. Better luck next time man!
 

cannn

Well-Known Member
This leaf here.. Nitrogen toxicity. Idk why your losing those leaves

Post pics of the issue and someone will probably be able to say for sure
 

Attachments

Johnei

Well-Known Member
Probably has something to do with the size pots they're in, combined with strong lights and high growth rate they're locked into the plant is scrambling for every last bit of fuel energy.
 

Funkateer

Member
This leaf here.. Nitrogen toxicity. Idk why your losing those leaves

Post pics of the issue and someone will probably be able to say for sure
if that's really nitrogen toxicity its very very in the beginning stage in my opinion... it's on one leaf in the picture also...:)
those pictures are with lights off so they appear very dark with the flash of the cam....
pots are 6x 14l and 2x 11 l so plenty of room for the roots...wasn't entirely sure if those dropped leaves were nitrogen deficiency or not enough light reaching them so I increased the grow fert... using bio bizz grow/bloom but I am currently not using more than the recommended dosage....

those dropping leaves are all below the canopy, not much light gets there so I guess it's normal...it's not an issue right now... and I think that in ScroG the plants indeed decide to get rid of older fan leaves who don't get any light, they suck the nutes out of them and let them dry up/fall off..not much photoynthesis going on in those leaves.


In this pic above of diseased deficient plants, there are about three spots that don't have a top and ruin your bud grid matrix. Better luck next time man!
you replied in the wrong thread dude? sorry man but 3 spots without a top? in this Scrog are plenty of spots with too many tops. that's more what I am worried about. they sure look deficient and diseased , alright man.


Nice looking scrog...what strain are you growing?
those are 5 northern lights, 3 are AK48
 

Johnei

Well-Known Member
I was being sarcastic grow bro. Looks fabulous!
I was afraid of this when I wrote that..LOL.. my bad.

p.s. just reading what youo wrote. consider a monster tree canna plant outside, all leaves deep inside all over dont get light and they dont drop. ;)

--edit.. smaller pots with plants in a state of high growth mode under intense light, would require a higher dose nutrient then same size plant in a larger pot, so you're probably on the right track upping dosage to stop the leaf dropping.
 
Last edited:

Funkateer

Member
I was being sarcastic grow bro. Looks fabulous!
I was afraid of this when I wrote that..LOL.. my bad.
yeah you got me:) was a bit blind right there, consider using a smiley next time;) .. these days you never know for sure how to interpret some things in the internet, if you know what I mean.. stupid people everywhere..glad you just made a joke lol.

yeah and I think they drop leaves cause the soil is pretty much empty.. they had a pretty long veg...

oh and now I have indeed an empty spot in the canopy :( one Northern light was a hermie...shit happens... had to remove one plant ..it really bothers me cause thought this run would be my most perfect canopy yet..last run it was not filled 100% this time it is pretty nicely filled, but one plant turns fuckin' hermie... damn..
 

cannn

Well-Known Member
Yeah i was pretty confused when i saw that. Johnei is always on point so i kinda just ignored it lol
 
Top