i'm about 6 weeks into flowering & mostly all the big fan leaves look like they have that leaf spore diease.
they are rusting up then drying crisp.
& i've noticed about 50% of the pistles are turning orangey brown & i've all ways gone by the rule once 80/90% of the pistles turn colour its time to harvest.
i'm growing on a nft system using canna flores & cannazym.
temps are ok ph & ec are ok as well

by the way these are dp mazzar & i have'nt got any big single colas growing just hundreads of like pop corn buds.
i have nothing but trouble with this grow with ph keep dropping & i've been adding loads of ph up to try & keep it stable.
think i'll go back to soil on the next grow.

heat stress by the looks of it.

looks like over feeding


what are the readings !

Its a lot easier to tell what is wrong with your plant if you turn the ballast off and use proper light so it gives proper colours in the pics. Just my opinion makes life easier for people trying to help


as asked before what ec are you running?
and temps?

its not heat i've kept an eye on temps & they have allways been between 70/80 i've never let it go higher than 80.
think i'll just start flushing these now as they have done my head in from day 1.

ph has kept dropping since day 1 & i've allways adjusted it back to 6.5 & when its dropped below 5.5 i've upped it back up to 6.5.

ec i gradually raised from 1.0 to 1.8.

but as the ph kept dropping the ec would go over 2.0 some times but not for long as i was checking every day

It looks like over feeding to me too, also i think your PH should be around 5.5 - 5.8. i only ever let it get to 6.3 max, mine do fine on this.

i would have had the ph at 5.8 if i could have but i dont know what it is with grow i've had nothing but trouble since day 1 even in the veggative stage.
like i've said nearly every day i've had to knock the ph up i've nearly used a 250ml bottle of ph up on this grow.
normally on other grows i've done i've had to knock the ph down ocasionly,just cant get my head around this 1.

next time its back to soil.

could this be a lack of oxegen to the resivour/roots as i noticed loads of roots in resivour when i changed the water.
i did have a air stone in it at the begining of this grow but the pump was to noisy for my liking so i stopped using it.

if your nutrient in your nft tank is splashing back into the tank, then lack of oxygen shouldn't be a problem, though more is always better, so the airstone (or maybe one quieter like an air ring) is definately worth having in there as well

but i reckon your problem isn't that but overfeeding at some point, which in turn has caused a nutrient lock out

had the same thing myself recently - often!

i think you should rinse through for a couple of days with plain water, then put a very mild feed in, 1.0EC or thereabouts, ph as said before around 5.8

the leaves won't get better that look bad, but you should still get some smokable weed at the end, tho it may take a touch longer

have a look at owderbs grow diaries and others similar in the grow diary section to see how it should be done for future reference, you won't go wrong

try to take it easy on the ph up/down as well. you shouldn't really have to use ph up, if i need to go up i use fresh water generally (mines ec 0.5 ph 7.4 from the tap)

good luck