dry, papery, brittle leaves ??

[JbBurnin]

The plants have lush new growth forming, fresh green.
But, the first leaves which are lowest besides those two mini ones that come first, has a palette brittle dry feel. They sorta have a blotchy look Wen under the lights. I was feeling one and the tip cracked and is hanging on but looks sad. I cleaned the leaves with water ph at 6.4-6.8 . They just look sick compared to the other leaves and especially to the new growth. I'm worried, and confused and frustrated.

Wat should I do to get them all back to same shade of green.


They're 16 days old from seed, unknown photo strain.

20/4 light , I have two under 4 26w 6500 cfls.

 

[JbBurnin]

Forgot to mention, my temps are min 80 max 90
My relative humidity is min 20% max 40%. Avg about 30% rh

Any ideas, why my first leaves are drying out or getting brittle/papery

 

[HomieHogleg]

You will get a much more knowledgeable prognosis, if you put up some pics.
Could some water or nutes splashed up on the lower leaves??
HomieHogleg

 

[roadsidevendor1]

are you talking about the little oval seed leaf? if so, no biggie
mine always die off soon after the real leaf comes along.

if not then..I never had green leaf go dry and papery so..
maybe we better wait for another opinion

 

[lowcoast grower]

Im thinking 90 is a little to hot may be drying them out???but im no expert,temps should be 79 to 83 for ideal condtions.if im wrong someone please correct me.

 

[JbBurnin]

To homie, yea its possible. I tried to be careful, didn't see any splash but it'd possible.


And to roadside,
The oval leaves are yellowing and curling down. The next leaves after those, two of them. Opposite sides from each other, those leaves are single fingered and they are looking blotchy or more off green than the rest of the plant. They just feel papery, and one of the tips snapped when I was feeling it. Still hanging on just snapped. Tiny tiny piece of the tip. Like I said, I'm confused cuz they look so healthy and the new growth in the center is coming out with two 5 fingered leaves and two tiny things protruding from the middle of those. They're lush vibrant green.

I'm gonna try to get pics, just dunno how to take them from my phone and put them on here

 

[JM]

ok... so... fresh new growth... thats a good sign...

couple things:

1) temps... too high carolina is right... 79-83 is more the range... 80-90 is risky even with a real good knowledge base.... though sometimes i run em a little hotter like that... I prefer to stay around 80-83 personally....

2) what is your soil ph? water ph in? water ph @ runoff?

high heat stress can cause that... but so can ph being out... so can lack of certain nutrients...

if you can get pics up thatd be better...

also... check:
https://www.autoflower.org/f34/announcements.html

specifically the deficincies link there... have a read... it'll broaden your knowledge drastically.

:smokebuds:

 

[JbBurnin]

Temps Avg 79-85 with my doors open and fan blowing in. With doors closed and fan on it gets up to 90+.

I have added a wet towel, and by leaving doors open, fan on, wet towel hanging, I'm getting rh of 33% and temps of 80-85.


Next time I water ill check my run off. Dunno what my soil ph is, but my tap water sat out overnight is around 6.4-6.8

My distilled water is between 5.8-6.2.

My soil consists of
2/3 jiffy seed starter mix
1/3 mg perlite
Tad of local pitting mix
Added dash of great white myco under taproot when I planted.

At day 12 above soil I fed them
Mixed 2 qts tap water (6.4-6.8)
5 drops mg cactus plant food 2-7-7
1/4 tsp great white myco

Fed them until I had run off. They took about 1 quart between the two of them.

They seemed to like it, but the top soil got dry super fast so I ended up watering them again 2 days later. By that time the top soil was dry dry, and the perlite took kind of an orange brown color.
I watered with the same mix as first feeding, only difference was 2 days it had been sitting.

Pretty much its 2 days after the second feeding and they're showing problems I have described.

Wanna know what caused it, or a combination of things.

 

[JM]

sounds like soil ph might have gotten tapped down a bit.... second feeding was a little early... should hit with plain water.... but i think the real prob is your temps judging by the green growth.... dep on your lighting sit.... temps in there my be 90+ but the plant in direct light surface leaf temps maybe be exceeding 100+ ..... the othr thing is humidity needs to be up.... 50-70% range... so plants can transpirate and therefore cool themselves from the excessive heat... you need ventilation..... a fane exhausting from your grow closet or room ... whenever the lights are on..

something cheap like this is quiet and prob will work... not sure your space size:

http://www.ebay.com/itm/NEW-BFQ90-A...947?pt=LH_DefaultDomain_0&hash=item1c23a642e3

if you water is 5.8 and you add nutes... its probably dropping to 5.5 or even 5.3 you'll want to recheck ph after good thorough stirring with the nutes in... its a good idea to bublle your water too as that gives them a little oxygen boost ... when you capture runoff and check its ph... note the input ph as well..
:smokebuds:

hope this helps

 

[lowcoast grower]

jm what is a good easy way to bubble water for soil or is this not necessary????I read ur thread on it but got a little lost brother you mind explaining to me??