headshot said:
Lots of interesting thoughts on what could be causing your plant problem.
Unlikely to be a ph problem with the water you're using and your leaf damage isn't really consistent with an out of whack ph. Your lower leaf clearly has some kind of deficiency going on there, either Mg or N, it wouldn't be anything else. As others have mentioned, your soil is well fertilised, so why a deficiency so early on? There's only one probable cause left - incorrect under/over watering, it's the most common new grower error, welcome to growing by the way!
If you're only watering sections of soil, around the base of the plant? Or not fully saturating the pot with water thus leaving air and dry soil pockets? All those roots growing out in exploration of moisture and nutrients are hitting dry patches of soil, and the plant can only extract moisture and nutrients from moist soil. That's probably what's caused your deficiency in what should otherwise be well fertilised soil.
Your problem is compounded by having the plant in too large a pot as others have righty point out, this merely makes the liklihood and negative affect of incorrect watering even more apparent, ie it exaggerates the problem.
You need to give the container a good saturating with water all over and all the way round preferably with a watering can with a sprinkler. The sprinkler helps to penetrate and saturate the soil better and of course 'emulates' the natural effect of rain by pushing oxygen into the root zone. You don't want to saturate the pot to the point that water then gushes and poors out underneath because this will simply wash away valuable nutrients, you want to aim for a small trickle of run off out of the bottom of the pot. Also be wary of soil that has a small gap around the inside of the container, where its shrunk away while drying out, because water will simply run out of this gap out of the bottom probably taking a few delicate exposed root hairs with it - don't let soil dry out and do this! Start from the middle of the pot, and this will push soil to close that gap, you can then start working all around the pot. The pot should feel heavy, it should feel as though 60-80% of that weight is just water.
Re-water when the pot feels light again and the soil just starts to pull away from the sides of the pot, but don't let the soil dry out completely. Once you've done this cycle a couple of times you should get a feel for the frequency of watering and how much water you'll need.
This is called the 'wet/dry' method of watering and is the most reliable and consistent way of doing it. Your shrivelled and mouldy leaf will not improve, pull it off. Once damage of that kind has taken place it's not reversible. The 'burnt' ends of your healthy higher leaves will remain but once a correct watering schedule is establised won't deteriorate any further.
If you do not correct the watering problem, your plant will eventually die.
Next time around try starting off in a smaller pot and work your way up to a larger one, this helps to develop and nice large root zone and you know how it goes, large healthy root zone, nice large healthy plant nice large bumper harvest!
Good luck and I hope you enjoy the fruits of your labours as I do, damn this Satori is good shit!
