AlphaWinner
- 26
- 3
bump that ph up to 6.5 going in,you dont sound like a salt buildup,soil does best at 6.5,wait about 3 days to see any change,if that isnt a reveg i agree with calirooted you got a light leakHey! First grow ever for me :)
Getting a bit stressed because one of my plant's leaves are getting yellow and it gets worse everyday. Some brown/black dots also started to appear and spread. Please check out the photos.
For more pictures, history, the amount of watering and nutrients, temp, humidity and so
https://growdiaries.com/diaries/26308-lara-croft
I tried googling for reasons to this, but can't seem to find the cause of this:
1. Soil PH problem - I checked my run-off water - it was PH 6.2 (the water were PH 6.1) - is this a good way to "measure" PH in soil? Anyway - between 6 and 7 should be fine.
2. Light burn - when it just started yellowing - I moved the light (1000W LED) higher by 15-20cm, but still - yellowing continues fast.
3. Heat/Cold shock - my tent is pretty much 24/7 - 25-26c and 50%RH - steady, without fluctuations.
Please help! I hope this doesn't get worse for Lara :(
Thanks!
3. If you can test the PH of runoff, you can test the ph of a glass of water with soil from the pot. Fancy term is a slurry. It’s easy to do. Google soil slurry. I mix for 1 minute and test in 20 minutes.
4. Look into a laser gun temperature reader. They’re relatively cheap and it’ll tell you the temp of your leaves and I believe (we) want them at 86 degrees. You can also put your hand on the top of the canopy for about 40 seconds. If you realize how warm the top of your hand is, then yeah they’re likely too close.
Unfortunatley - the yellowing has got worse, so it's not "normal" :(My experience has taught me that when in bloom, those same fan leaves give it up and wither, after having turned yellow. You may just be withnessing what’s normal for this strain...
As far as too much light strength, betting that’s not it, 25” away may be too far, when running my 1200 bluples they were at about 12-18” away from the tops. My cobs I run closer , about 12” off the canopy, that’s my 600 watts measured at the wall, array...
WAlways start auto flowers in their final pot. You shocked 5he hell out of it.and the yellowing leaves might be normal in this stage of flowering in this strain/ genetics.most photo period plants get yellowing or discoloration in the leaves near the end of flowering or when flushing due to the plant using up the nutrients stored in the leaves
What is your starting water before nutrients, RO? Tap? if tap what is the alkalinity and ph?
I see iron and calcium deficiency, but agree with Calirooted there is a lot going on here. I've also never been a fan of straight 24hr light cycles, even for autos I would run at least a couple hours of dark.
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