YorkshireNewbie
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- Jun 26, 2025
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The bloody Ph was almost NINE!!!This makes the most sense to me, given what I'm seeing with my plants.
Thank you.
Whenever I turn the extractor fan on, even on the lower setting, the plants curl up aggressively, and quickly, but I need to have it on, especially when the buds begin to grow (fingerscrossed)
Ive got a dilemma on my hands unless I can find a way to fix it.
I live in apartments which were converted from commercials premises, and my only windows open into a courtyard with high walls on all four sides. Not much wind gets down here, and the fresh air gets blown over the top of the walls long before It reaches down to me, 50 yards below. Consequently i suspect the air is, as you identified, very dry.
Ive bought a duct booster fan, but only after buying it did I realise it only circulates half the amount of air as my extractor removes, so might have wasted my money there. Still, it wasn't a gmhugd expense so I can but the 5 inch model which is only about 20 cubic ft per hour less, and I hope the air flow in the tent will be almost neutral then.
I'm also going to try running some ducting from the inlet hole (and duct booster fan) right up to the window to get some better air, albeit not the best still.
I've got a humidifier going 24/7 and the plants do look a lot better after a couple of days with no extractor, however within minutes of me turning it back on to see what happens the leaves curl up quick.
I'll just keep trying different things to see what works.
that explains the necrotic patches on some leaves, the chlorosis, and likely the leaf curl too.
My RH is sweet, right about 70%, and my temps are good, hovering around 25°c, so by process of elimination i think the massively high ph has been the problem.
I'm writing these notes to keep a log of sorts for the future, and to help any other new growers with these teething problems.
A pH pen is an absolute must.
I'd have killed my plants eventually if I hadn't caught onto this.
Ive just switched them back to 12/12 too, and hopefully ill report back in a few days that most of these issues have been sorted.
Just waiting for the TDS pen to arrive now.
I'm now on week 7 of veg, and km quite concerned these are female plants. The bracts are distinctly bud shaped, and most definitely NOT sac shaped, so it could be a lot worse.
Theyre still growing, and have a decent colour to the leaves, but I'm hoping they'll be a lot better now I'm addressing the high ph.
Fingers crossed this is it.