Welcome to Cannabombs "Mystery of the week"
I am growing a Northern light Automatic in soil.
The soil has a Ph of 5.5-7 as stated on the bag.
The plant has been great with explosive growth up untill 7 days ago.
I started my seed on the 13/5/14
Problems started showing half way through week 5.
It all started when I changed my Fertilizer, I had read that you are to always check your PH before giving the plant its food, as I use powder nutes that get sprinkled over the soil first, I could not do that, so I went and got some basic Tomato liquid nutrients.
The liquid nutes have a NPK rating of 3-1-5 and also contain trace elements. The bottle says to use it once a week but it says nutrients remain active and usable for 2-4 weeks in soil. They recommend 10ml per liter.
On the 18th of june I gave the plant 10ml of fertilizer with 1.5 liters of water, I did not check the P.H going in, but after I saw this problem I made up another feed of 10ml fertilizer and 1.5 liters of water tested the PH.. the water was so dark I could not see the PH drops doing anything at all. If anything it looked like my PH was 3-4
This was the first sign I saw, it happened very fast within 24 hours.
The markings were only on two leaves, and it was the last two fan leaves on the top of the plant(the main cola or top)
So on the 21st, Three days after giving it this fertilizer the problem started getting worse and I was advised to flush the plant, which I did.
I checked the run-off after 30 mins of flushing and it was still coming out at 5.
2-3 hours after the flush the plant showed dramatic spread of the problem it seemed to move across all the tops in a matter of hours, the problem was much more spread out and not so much direct damage to one leaf, they all had a spot or two and all looked alittle greyish..
I let the plant dry for two days and on the 24th I gave the plant a very light feeding of my old nutrients.. they have an NPK of 10-6-10 I gave it half a teaspoon and sprinkled it over the soil and watered, I checked the PH and it was still sitting under 6.
On the 25th the problem seemed to stop spreading but the already affected leaves seemed to be getting worse.
On the 26th being today,
I flushed the plant for another 30 mins and I was not going to stop flushing untill my PH went back to 6.5 it took about 20 liters of water till the run off stopped coming out orange and more clear like water, checked PH and got a rough 6.5 that was roughly 12 hours ago and now the problem seems like it has started to spread again, now almost all the tops have been affected.
There is not alot more to say, I am hoping the pics can explain abit aswell =)
If you look close you can see that every leaf that is light green has been affected in some way or another, some leaves also have bluish grey patchs not brown, the main steam also has red lines running up...
Thanks alot for reading and helping me so far guys, I am sure it gets annoying have newbies always asking question you have answered thousands of times, I really appreciate the help that I have had, from buying my light to buying hydrogenperoxide for fungal gnats its great to find like minded people in a place that isnt full with big heads and people just being A$$ holes all the time =)
Ask for anymore info and I will do my best, and please if I just need to chill out and stop worrying tell me, I would love to hear that =)
The pics dont do the problem justice, it looks quite abit worse in person =/