New Grower BillyWu's first grow - Think Different autoflowering

Day 48

Not a lot of change. Got a bit of leaf browning and curling going on at the top of the plant. Nothing major, but I'm trying to fix it. My soil pH is a bit too high, waiting on the stuff to fix it :]

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I thought it may have been light burn, but I'm not so sure. This is how far the plant is from the top of the tent (can't raise the light any higher):

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doesnt look like light burn to me. have you taken a temperature reading?
or just put your hand just over the plant and see if its any way hot.
id ph or feed related though very yellow this early...(hard to tell in hps though) lockout from the ph?

maybe put a thread in the infirmary with a pic of it in natural light.
 
I think you're right about the pH, the light is still quite far and the fan is blowing directly at it. The hand test tells me it's not very hot either, temperatures are normal.
Getting the pH right in soil is a pain in the ass. It was 6.0 to begin with, now it's about 8.0. Waiting on the sulphur to fix it.
 
If it's climbed that high there could be something else, maybe salt build up, going on. I'd give them a good flush while you're waiting for the sulfur. That should help bring it down some.
 
I'll see if I can do that :] Do I just take it to a sink and run a load of water through it?
 
pH the water first and run 3 times your pot size through it. So if it's a 3 gallon pot, run 9 gallons through it.
 
Got it, thanks :] It's a 20 litre pot, so 4.4 gallons. Total of 13.2 gallons, so a whopping 60 litres! Might take a while :] I'll do it next week after I'm back from a trip just incase anything goes sour whilst I'm away.
 
I wouldn't wait, I'd get on it right away. Sooner you fix it the quicker the plant will respond.
 
I'm not sure if I'm gonna be able to do it so soon. 60 litres is a lot of water and I gotta wait for the chlorine to evaporate out of it, which should take a day. I leave for the weekend in less than 24 hours :/
 
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