Leaf pics . . . . Ongoing problems ???

yossa42

yossa42

Member
IMG068.jpgIMG069.jpgIMG070.jpgIMG071.jpgIMG072.jpgThis is an ongoing problem seems to start at week 4 of flowering and gets worse throughout the rest of the grow ????

Growing in all mix soil 10 litre pots
using b cuzz a + b soil nutrients
always checking ph and ec
veg for 6 - 8 weeks then move to flowering room
add pk 13/14 big bud and overdriver later on

flower room is 4 meters x 4 meters x 2 meters high
temp is 80 - 87 humidity 50/60 %
6 x 600hps light
12" acoustic outake 2500m3
2 x 6" intakes

ANY ADVICE COMMENTS QUESTIONS APPRICIATED THANKS
 
bird mcbride

bird mcbride

Well-Known Member
When you open the door when your fans are running there should be no suction on the door. If anything the air pressure should push the door open. I can think of a whole lotta reasons why this would happen to the leafs. Has the formula you're using ever been successful in the past? I go 1/6 fertilizer as what it says to mix up for dirt. When I drain my op every five days, I use the water to water my veg. This simplifies things for me. Don't overwater or let your plants go dry. Make sure the water is kept airated.
 
napa23

napa23

Well-Known Member
bird mcbride said:
When you open the door when your fans running there should be no suction on the door. If anything the air pressure should push the door open. I can think of a whole lotta reasons why this would happen to the leafs. Has the formula you're using ever been successful in the past? I go 1/6 fertilizer as what it says to mix up for dirt. When I drain my op every five days, I use the water to water my veg. This simplifies things for me. Don't overwater or let your plants go dry. Make sure the water is kept airated.
Click to expand...
Just curious, why should there be an outward force of air when opening the door? Seems like the exhaust should be greater than intake, creating suction. If the exhaust is powerful enough, there really isn't a need for intake is there? The exhaust will push the hot air out, causing more cool air to be sucked in through a hole to replace it. Is this incorrect logic?
 
bird mcbride

bird mcbride

Well-Known Member
napa23 said:
Just curious, why should there be an outward force of air when opening the door? Seems like the exhaust should be greater than intake, creating suction. If the exhaust is powerful enough, there really isn't a need for intake is there? The exhaust will push the hot air out, causing more cool air to be sucked in through a hole to replace it. Is this incorrect logic?
Click to expand...
Pot doesn't do so well in a vacuum. I met Jack Robinson, the guy who designed the original hoover. He agrees.
 
napa23

napa23

Well-Known Member
Ah, interesting. Good to know. I don't do intake/outtake, but that'll probably be helpful to someone.
 
bird mcbride

bird mcbride

Well-Known Member
I run a small 4 inch computer fan for intake 24/7 to enrich the density of the air in the op and garantee positive pressure in the op. Nitrogen disipitates faster when the air pressure is reduced. You could use something like 0-10-10 if you wanted to stick with just a blower, but if it were me I'd switch it to an intake fan and have exhaust ports. Thicker air makes easier breathing and less nitro burn. I keep grapping my scales thinking there my mouse.lol
 
yossa42

yossa42

Member
Thanks for the quick replies
room pressure is fine get plenty of air exchange and movement but this is really starting to get me down i figure its not the heat thats a problem or humidity as i have a dehumidifier running 24/7 so that sorts that out.
could be magnesium ? or another nutrient deff ? IMG029.jpg
 
Serapis

Serapis

Well-Known Member
bird mcbride said:
When you open the door when your fans are running there should be no suction on the door. If anything the air pressure should push the door open. I can think of a whole lotta reasons why this would happen to the leafs. Has the formula you're using ever been successful in the past? I go 1/6 fertilizer as what it says to mix up for dirt. When I drain my op every five days, I use the water to water my veg. This simplifies things for me. Don't overwater or let your plants go dry. Make sure the water is kept airated.
Click to expand...
That is not correct on the air pressure. Many grow rooms are designed to have negative pressure for a reason, odor control. This is accomplished by have fans set to exhaust air, and the intakes are passive. This is common knowledge in growing communities. You are giving out counterproductive advice.

Also, why bother with nutes if you are going to leave your plants struggling for nutrients? I would never recommend only using 1/6th of the recommended dosage unless I was mixing clone or seedling food. I would never deprive adult plants and only feed 1/6th. That is also bad advice. Maybe there is confusion? This is a soil grow you are posting in.
 
Z

zaohua768

Member
I run a small 4 inch computer fan for intake 24/7 to enrich the density of the air in the op and garantee positive pressure in the op. Nitrogen disipitates faster when the air pressure is reduced. You could use something like 0-10-10 if you wanted to stick with just a blower, but if it were me I'd switch it to an intake fan and have exhaust ports. Thicker air makes easier breathing and less nitro burn. I keep grapping my scales thinking there my mouse.lol When you open the door when your fans are running there should be no suction on the door. If anything the air pressure should push the door open. I can think of a whole lotta reasons why this would happen to the leafs. Has the formula you're using ever been successful in the past? I go 1/6 fertilizer as what it says to mix up for dirt. When I drain my op every five days, I use the water to water my veg. This simplifies things for me. Don't overwater or let your plants go dry. Make sure the water is kept airated.​
 
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