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7th week; deficiency? light burn? opinions appreciated!

francis pharmer

francis pharmer

New member
I wish I could say I thought this was normal late flower deficiency but i don't think so.

the low down:
it's a random diesel lineage genetic in a blend of happy frog, coco and perlite.

looked healthy and vibrant yet a little dark at week 2.5 of flower so i backed off of the grow nutes and then she yellowed almost instantly.
(400-1000 ppms of a 3 part + cal mag (RO water) PH 5.7-6.1 weeks 1-3)

fairly extreme defoliation at day 21

ppm's raised to 1400 at week 3 and back down to 800, she greened back up until now and the yellowing happened almost overnight--
there were some light leaks and night humidity problems. watering about every 3-4 days.
the yellowing is all over, random and not affecting every plant (yet)
however, they all look stunted and kinda crappy.

ideas?
 

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9fingerleafs said:
PH problem for sure. Way to acidic for soil. Regardless of ppm the plant cannot absorb nutrients in that ph. Try to water at 6.5 I'm sure they'll get better :)
Click to expand...

This makes sense to me as i have the same leaf symptoms on mine at approximately the same timeline but i know mine is a pH thing. Being sick for the past week i went a few days without checking my PH as i was doped up on cough medicine only to test it a couple days ago and had a ph of 4!! However the color of the pistols is throwing me off a little. Try what 9fingerleafs said.
 
it's a hodge podge of nutes...Cutting Edge solutions 3 part + additives=cal mag plus/god silica (once a week)/ an bud xl /a bit of hydroplex for extra p.
from clone
hps DE 1000 watt
they're only at 7 weeks--Waay to early for a sativa to be ripening.
 
In the 4th pic, the sugar leaves look muddled. I don't know if it's just smashed trichomes or possible bugs. Probably not since the fan leaves look clean, but just an observation. Maybe take a peek under those leaves... look for little brown/white dots....

I don't know about the ph suggestion, 6 should be fine for coco/soil mix.
 
should've mentioned...it's 1/3 coco, 1/3 soil and 1/3 perlite. Every coco blend chart i have checked (botanicare slacker etc) always says that you should go with the hydro numbers for coco based media so i've kept it at the lower end. The ph has been whacky though since i've had to switch to RO, after i add my nutes it's down towards 4 and i have to add ph up. i'll try raising it to 6.5 -- thanks for the suggestion:)
 
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what do you mean by "muddled"? i noticed a reddish sheen that i thought might be indicative of a P issue. No mites but i do use predators for both mites and thrips.

i have an indica strain as well that does not seem to be having issues at ph6.
 
Wait when you say 7th week do you mean from seed or from flowering. If it's from flowering the pistol color makes more sense to me and i would say it may be close to harvest time and that leaf discoloration seems to happen...at least to me it does.
 
The white streaks on the sugar leaves. I had some mites that got into some sugar leaves and they looked a bit like that. Some were even on top of the sugar leaf which is uncommon...

You check those trichs for ambers yet?
 
yes, sorry, should've mentioned that. 7th week of flower. wasn't going to start flushing until next week but am going to start tomorrow. she matured too early for some reason.
 
sorry- was referring to the pistils being dark in that last comment. yes, just checked trich's-- they do not look ready yet to me. will post pic below
 
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