olddirtybastard
Member
i always kept my humidity at 65% for as long as i could, gotta scale it back though depending on how fat the buds are getting
That's because those pics were taken in the middle of a light cycle. My problem
was happening when the lights (and extractor fan) went off at the end of the cycle.
Lights out, fan off, plants still happily transpiring for another 45 minutes or so.
I fixed the problem by putting the fan on a different timer, letting it run for an hour
after lights out, and 15 min per hour after that.
what it is.
How much more proof would you require?
Here's what was happening. The lights would go out, the extractor fan would turn off. Within 15 minutes the plants would be dripping with water.
All 'night' long. Then the lights would come on the soaking wet plants. The light would heat the water, and that caused the pattern you see on the plants.
P.s. I see that you're going into other peoples threads and acting all 'I know better than you' and being argumentative. Don't bother, unless you'd like to be banned.
Gnome, as you know, there are a lot of different reasons why a lot of things happen. It's hard to narrow it down sometimes. Variables are everything. It could be that the humidity in one situation wasn't right for the next. On the face of it though, those figures don't sound like they should be causing you such severe problems.
Have you got a dedicated thread about it?
Gnome, chances are mate it's a simple case of overfert and backing off on the nutes is what's helped you more than anything.
The leaf curl you showed in that link is typical of low humidity, but the picture above looks like nothing more than a little bit of burn. If you've predicted a bigger draw on nutes because of the increased Co2 and have fed accordingly, and with silica in the mix, I'm 100% sure that's all it is.
That's got nothing directly to do with high VPD, but a knock on effect of it is the higher ec makes the tissue of the foliage more susceptible to burning at higher temps and lower rh.