help leaves turning black on three plants

New to marijuana growing? Need some basic questions answered to get your garden started? This is the place to look.

im currently having a problem though.

three of the most aggressive growing widows have start turning brownn on there leaves.
and they have started to curl up let me know what you think
THE CLONES ARE WHITE WIDOW THREE WEEKS OLD UNDER 2000 WATTS
grown in promix

oh and yes before someone gets me for asking a question i did check th tutes
looks like phoshporus but im looking for comformation.. thanks
ps
the cookies have me higher then i have been in ten years maybe twenty.........

wow
i never knew
Attachments
new thread 009.jpg
new thread 007.jpg
new thread 004.jpg

well i :/ flushed the three effected plants
and gave them a 1/4 feed of mag and phousphorurs
any other ideas guys?

looks like a mg problem to me I would think cal mag plus as it has but really it could be anything soil or dro what is your ph ? how often are you watering ?
Save Our Country and VOTE!!!

Hum,,,If this is occuring twards the top of the plant,I would suspect heat stress.The flush should have a positive effect if its nute related,but I realy don't think so..I notice in the background some other leaves tips are upturned aswell..Are they also recieving "N".

Mr.O

Mr Obvious wrote:Hum,,,If this is occuring twards the top of the plant,I would suspect heat stress.The flush should have a positive effect if its nute related,but I realy don't think so..I notice in the background some other leaves tips are upturned aswell..Are they also recieving "N".

Mr.O

heat stress is my first thought since these three plants are the tallest, i marked the leaves to see if they spread.
they have been getting nitro half feedings for thre last 2 weeks.

they are grown in promix...

Ive seen similar looking wind burn also????

i dont know i marked all the damaged leaves,
gonna repot and switch sunday so see what happens :grin:

well the first couple of days after flush
the seemed to stablize but today new leaves were affected
and 2 new plants are showing early signs, after dinner i will post
good detailed picts of early signs on up.
:rauch04:

Make sure thier not getting too much "N" bro..And give'em some distance from the light.
It doesn't realy look like a fungus or anything that I see from those past pix..But,new shot's might tell a different story..I'll Check back later..

Mr O

ok just so all the facts are out again.

these are white widow clones 1 month old (from day rooted clone went in soil)

promix growing medium in 2 quart starter pots but just transplanted into 3 gallon pots.

sensi grow veg 2 part formula fed 3 times total at half strength and water only every other feeding.

in a 8x4 square foot area under 8 x 250 watts metal halide lights for a total of 2000 very

evenly distrubuted lite.( last grow some adult plants were touching the glass and not burning.)

the lights running 24

humidity averages about 30- 40% temps are 78 .

the ones that are real dark took about 1 week since onset of symtems to totally dead leaf.

it seems to be effecting all parts of the plant new growth old growth top and bottom..

no pest in the room ever except a spotting of fungus nats 4 months ago and we set traps only caught 3 watered
with neem and never saw them again.

tap ph in this erea is about 6.1


the over all room is healthy with sixty white widow plants and 9 big bud.

heres some updated picts.

gonna water only again with tommorows watering it will be twice in a row with out nutes for the whole room.

figure if its a deficincy it will show.

thanks mr o for taking a intrest i hope this helps every one help me!!

mrs thug sends her love to you and hazel .

sorry about the mess just transplanted 25 a few hours ago.

and twenty five tommorow so didnt clean up yet

if there are other questions here is a link to my grow
mrs-thugs-white-widow-and-big-bud-sog-pict-updated4-t35892.html
Attachments
SICK 014.jpg
here you gould see that all levels of the plant are effected
SICK 013.jpg
this leaf has been showing signs for
4 days
SICK 006.jpg
her is another leaf early on
SICK 005.jpg
in this pict you can see the leathery texture of the effected leaf
SICK 019.jpg
this is the early on looking symtems on this plant started showing symtems 2 days ago

Next

Return to Beginners Forum

 


x #{title}

#{text}