Emergency Situation Here!!! All suggestions are greatly appreciated!

High buds,

I am currently growing 10 plants in 5L pots using URGO Coco Pure Superior Light Mix in 70x120cm semi-enclosed space (there is reflecting foil on three of the sides, one always stays open and there is no ceiling over the light).

Lights are 2x Meanwell ELG-150-12A running 10M Chinese 5630 LED hardstrips each. Both run at full power for approximately 240W in total, and are around 20-25cm from tips. Light schedule is set to 18-6 (note the six hours are not entirely dark as the plants are not fully enclosed and some light might reach them during the day).

Temperature as of time of post is 27.5C and RH48%. Temp has very rarely been over 29C and is usually around 26C. RH is on the low side now.
Coco PH is 6.4.

The problem seems to be a lot of discoloration of the lower leaves, and generally not happy looking plants. There are some burnt leaves too. Started treating ( yesterday) for Magnesium deficiency with epsom salt solution => 4.5 L of water to 3tsp of salt applied during watering and also as a foliar spray. Also a quick boost was added today (1 part urine in 10 parts water ) as the growth is supposed to be organic, and no other fertilizers were available. No other fertilizers were used so far in the growth.





Here is how they are spaced.



Bubble Kush replanted from jiffy on June 25, 2017.
Height: 15cm.



Amnesia Haze replanted from jiffy on June 25, 2017.
Height: 30cm.



Lemon Haze replanted from jiffy on June 25, 2017.
Height: 12cm.



Cotton Candy replanted from jiffy on June 21, 2017.
Height: 19cm.



Pineapple Express planted in regular soil mixed with one part bio worm castings to 4 parts soil.
Height: 14cm.



Bubble Kush replanted from jiffy on June 21, 2017.
Height: 16cm.



Lemon Haze replanted from jiffy on June 25, 2017.
Height: 15cm.



Lemon Haze replanted from jiffy on June 21, 2017.
Height: 23
cm.



Lemon Haze replanted from jiffy on June 21, 2017.
Height: 22cm.



Is there a serious problem here? Its my first grow and all advice is appreciated and highly needed!

Lemon Haze replanted from jiffy on June 21, 2017.
Height: 19cm.


Here are some close ups of some burnt and discolored leaves:

Urine? 1 part Urine and 10 part water? I thought urine is really high in Nitrogen, I could be wrong, I'm not familiar with organic growing but 1/10 seems to me an overdose, that's prolly explain the tip burns. I believe urine have mercury too.

Maybe some experienced organic grower may have a better diagnosis of your problem.

Xs121 said:

Urine? 1 part Urine and 10 part water? I thought urine is really high in Nitrogen, I could be wrong, I'm not familiar with organic growing but 1/10 seems to me an overdose, that's prolly explain the tip burns. I believe urine have mercury too.

Maybe some experienced organic grower may have a better diagnosis of your problem.

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Hello Xs121,
Thank you for your reply!
Burnt leaves are not cause by urine solution, because it was applied only today. Burns showed up around 10-12 days ago.

chemphlegm said:

"Started treating ( yesterday) for Magnesium deficiency with epsom salt solution => 4.5 L of water to 3tsp of salt applied during watering and also as a foliar spray. Also a quick boost was added today (1 part urine in 10 parts water ) as the growth is supposed to be organic, and no other fertilizers were available. No other fertilizers were used so far in the growth."

put that shit away and get some organic fertilizer online. epsom salts are organic? anyways try some real plant food, like poop, compost, organic spikes. my urine has no mercury and I am proud of it. you could piss straight into a pail with no issues with a watering.

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Hello chemphlegm,
Thank you for your reply!
Are you saying my problem is no nutrients?
I have some yarrow and stinging nettle fertilizer tea in the making (two days until its ready), so that would be their first normal feed.