Curling Yellow Leaves + Discolored

[Gcyum]

Problem: Yellowing, curling leaves. Overall discoloration

Medium/grow method: Soil, OF, 1 gallon fabric airpot thing

Feed: and supplements used: General Organics GoBox

water source: Tap water/Bottled PH'd to 6.0-6.5

Strain/age: Nirvana White Widow Auto 20 days of this posting

Light used: Plants started w/ Mars Hydro 300W LED but I switched to King Plus 1000W after 2 weeks.

Climate: Humidity ranges from 20% with lights on to 45% lights out. Temps now range from 70-85 lights off/on.

Additional info: See below


Water every couple days until runoff. I do not measure the runoff PH.

I have been feeding nothing but water PH'd to 6.0-6.5 and once a week 1ML of BioRoot and these issues starting developing within the last week. Today was feed day so I gave this plant a small amount of CalMag and General Organics BioThrive "Grow" thinking it may be hungry but now I am not so sure.

I am growing in a very small 1.5'x2'x4' cabinet and fought heat issues with temps getting to 100 degrees for hours. I have a fan blowing on them at all times and have 1 intake fan and 2 exhaust fans up top. I managed to get the temps down to 85 on average but only after spending most of their lives with extreme heat. I could probably get it down to 78-79 by switching back to the Mars Hydro. To be honest I don't really know which would be better in my situation.

20 days old today and maybe 4" tall at most



Any ideas? The whole plant just varies in shades of green and just looks bad overall. Some leaves are turning yellow while one has curled up and looks near death.

 

[bklyndiaz]

Hey, Gcyum, I'm no expert, as for your tap water, are you letting it sit over night to evaporate the chlorine? As for lights, I would veg with the mars 300 and add the king plus when you start flowering. As for some folks around here say if you using led lights you should use Cal/Mag with every watering, I think you should lay off the Nutes for at least another week. Also, your soil seems to be cracking and dry.
Good luck.

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[Gcyum]

Sometimes I let it sit and sometimes I forget to fill up the container the night before so sometimes I don't, although I'm getting better at it lol. I will do some more research on cal/mag with LED lights. I wasn't planning on giving nutes just yet, I just kinda panicked and didn't know what to do.

As for the soil- I have been very cautious not to overwater so I've been letting everything dry out pretty good before giving them more water. Maybe I should start to up their water? Right now it's getting about half a liter per watering (every 2 days)

 

[bklyndiaz]

Try covering the top of your soil with some kind of mulch, it will hold the water and keep the top moist.

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[Gcyum]

Try covering the top of your soil with some kind of mulch, it will hold the water and keep the top moist.

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I switched the light back to the 300W and the plant looks much better overall. The twisting is starting to straighten out finally, I think because I dropped the temps significantly. But the same leaves are continuing to curl and yellow and die. But with this, no new growth is showing this and it's sticking the same few leaves so I'm going to just keep on keeping on and see what happens with it..

Thanks for all your insight bklyn.

 

[bklyndiaz]

Yeah, @Gcyum, sometimes that's all you can do! "Keep on keeping on" I would make sure your water source is chlorine free, and plenty of air circulation. You are already on the right by lowering your temps.
AFN doesn't seem to have an active infirmary thread, unless I'm not looking in the right place!

https://www.autoflower.org/index.php?threads/11/

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[namvet25]

Those high temp probably hurt her.Try and keep temps around 80 degree and lights at 24 to26 inches from plant top.Make sure the entire pot is moist but not to wet.Don't overfeed at this point because there should be enough nutrients in the soil for couple weeks.

 

[Gcyum]

Those high temp probably hurt her.Try and keep temps around 80 degree and lights at 24 to26 inches from plant top.Make sure the entire pot is moist but not to wet.Don't overfeed at this point because there should be enough nutrients in the soil for couple weeks.

I managed to get it down to 84 degrees at the hottest point, it is averaging around 82 with a low of 77 when lights are out. Tons of air circulation around the plants with 2 fans blowing around the canopies + 2 exhuast fans. Much better than the 100+ temps I had before. Lights are at 23" from biggest plant top, but unfortunately that distance will get shorter as the plant grows up (cabinet only so tall).

I will keep off the nutrients as I wasn't planning on starting nutes until week 5 anyways so no worries there.

As always, thanks for all the help. Learning new things everyday here!

 

[bklyndiaz]

I managed to get it down to 84 degrees at the hottest point, it is averaging around 82 with a low of 77 when lights are out. Tons of air circulation around the plants with 2 fans blowing around the canopies + 2 exhuast fans. Much better than the 100+ temps I had before. Lights are at 23" from biggest plant top, but unfortunately that distance will get shorter as the plant grows up (cabinet only so tall).

I will keep off the nutrients as I wasn't planning on starting nutes until week 5 anyways so no worries there.

As always, thanks for all the help. Learning new things everyday here!

If height is a problem! Have you tried LST?

https://www.autoflower.org/index.php?threads/57314/

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