Please Help !

[JokerDooD]

Hello all,its been a long time since i posted on here,but i know this to be a great place for help and advice so here goes..
im growing 4 cheese plants with canna nutes but im getting brown spots along the veins of the leaf.anyone got any ideas what this could be ?
i have checked around but cant seem to find anything that looks exactly like mine,looks like a ca deficiency but im just not too sure.

they are under a 600w hps in 25ltr tubs,2 weeks into flower sofar i have fed them half strength nutes ,flores,boost,and canazyme.
the ph is fine,the only thing i can think of is the temps , lights on @ 17c so it is a little cold for them in there >
could this be a temp problem ? also have a little gnat problem , but nothin too serious only a few flys ( had worse problems with them in hydro)
any help advice would be apreciated
thanx

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JokerDooD Reviewed by JokerDooD on 10-27-2011. Please Help ! Hello all,its been a long time since i posted on here,but i know this to be a great place for help and advice so here goes.. im growing 4 cheese plants with canna nutes but im getting brown spots along the veins of the leaf.anyone got any ideas what this could be ? i have checked around but cant seem to find anything that looks exactly like mine,looks like a ca deficiency but im just not too sure. they are under a 600w hps in 25ltr tubs,2 weeks into flower sofar i have fed them half Rating: 5

[Salvein211]

I dont have experience with those nutes, but I did a google and found two links that kind of reflect your problem. Both said mg defiency or ozone problem, as if you were to have one of those generators for smell..

Brown Spots On Leaves!!! (Pics Included) - Hip Forums



For the 2nd link, a quarter of the way down is a description
Marijuana Plants Problems - Yellow Leaves, brown spots, nutrient shortage etc.

[Salvein211]

Whoops, hit submit to quickly. 17C is like 63F ... That is prettycold for a plant. And this is WITH the lights on??? This may not be a cause but will be if you dont get on that.

[JokerDooD]

thanx for reply ,i have had mg problems before and didnt look anything like this , i will sort my temps out today and hope this wrks , if not i will try MG thanx again , and thanx for link , does look just like mine

[WashougalWonder]

spider mites

[bobjob4u]

I was thinking bugs as well. Take you scope you use to look at your trichromes and look under leaves . You might see one of those pesty buggers. I use hot shot no pest strips in my room.pest stay far away accept for my cat once and a while when he want to catch a buzz. A magnifing glass will work if you dont have a scope.Dont make any sudden changes till you have looked for bugs!Maybe rusty will stop bye and give some insight?he has lots of experience.

[JokerDooD]

i have just eliminated all the mites a few months ago , with a sulphur candle , no signs of mites since then.i assure you all i know wot mite damage looks like , lol , lived with em for a cpl years , deffo not mites , mebbe the gnatts ??
thanx again for input

[WashougalWonder]

maybe mg od then

Fill out a troubleshooting form

[JokerDooD]

does anyone ever really take the time out to fill in that long form? remember this is 100% stoner forum lol , but here ya go , maybe i be the 1st


well the plants were under a 250w mh light for a while,then under a 400w hps still in veg for about a week ,
then str8 into flower under the 600w hps, i have intake and exhaust,also growing in a loft space
so right now they are in flower 3 weeks,under a 600w hps , i water every 3 days or so with 4 liter water ,
with canna nutes added , flores boost and using cannazyme,
week 1 and 2 i gave half dose ,now into week 3 im on full dose ,flores 50ml per 10L water.
the plants worse affected were the ones directly in front of the fan (circulating)which leads me to think it is the temps,des the cold night temps lock out nutes ,
like mg or other ?
What is your experience level? (first timer, novice, experienced...)

Your Equipment:
.1) (250w mh veg 4 week)400w hps flower 1 week)600w hps flower 3rd week now
.2) Distance from tops? 14 inches , not too close
.3) Reflector type? batwing type
.4) Is there a consistent fresh air supply? yes
.5) Do you have an exhaust fan and a circulation fan? yes
.6) What are the bulb wattages, kelvin ratings, and schedule?does it matter :P NO!!!

Your medium:
.7) Specific brand and type of soil,really cheap soil from local garden centre , now using canna for future grows but have used same cheap soil for a long time without this result
.8) Size of container.25 liters
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings?no didnt use these , there in cubes,again does this matter

Your nutrients and water:
10) Source of water? tap water , pH 7.1 not tested with nutes yet , ( friend borrowed meter
11) Method of checking water ph. (ph pen,
12) Method of adjusting water ph. PH Up..down etc etc.)

14) How often are you watering between feedings, and how much per watering?water roughly every 3 days , 3 liters each ,50ml flores an 25 ml boost at mo to 12 liter water , so under feeeding at mo
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
16) Are your ph levels stable, or do they fluctuate?
17) What is your ingoing water's ph? ...your runoff ph?
18) Do you foliar feed? NO
Your growroom:
19) Indoors or outdoors? indoor
20) What size of closet, room or hut?2x3 meter
21) What are the temps and humidity levels while lights are on? ...With lights off?hmmz on 26 ish ,, off 8 - 11 c
22) Have you seen signs of insects in the growroom?gnatts . mites are all dead due to sulphur candle ,

clones , cheese,got a blzbud from seed in veg room also , this is in same soil etc etc , but has no marking at all, i have a cheese in veg , from same stock as others , and this has same marks , even in veg room , veg room in wrmer place too so makes me doubt the temp theory,coulde it be a sulphur thing ,? how does it affect plants , ganja ?
thanx again for help , really want to find out the problem , not just for me but for others i see looking for answers , ppl keep sayin mG , but half those ppl would say MG if ya run over ya plants in a car an posted pics.sad but true ,,thanx again

[WashougalWonder]

The form is serious to me, all the stuff adds up. I think nute od. What the fick size pot? Raise pH to 6.5 incoming. Soil is what? Canna? What is Canna?

wish Rusty had not been banned he would have been a big help here