Ouch, over sensitive Kush plants or some kind of deficiency?

[215zealot]

Check these plants, they are a week into flowering. Hydro Cococoir w/ Hydroclay, on GH LF, the PH is always maintained a constant 5.5-5.8, we are thinking about flushing the entire medium.

[Kcar]

Hey now! I have that going on too (the yellow part)
I think it is potassium lockout from too high a PH.

Check out this thread...
"Dark green and bright yellow"
Sorry can't post a link yet...


Also could be a magnesium prob....
not really sure. (I lowered the PH and added
Epsom salts) And the new growth
looks alot better.

My plants are SS Bubblegum.

Good Luck!

[Growdude]

Those spots look like a light burn if they were close to a bulb.
1st pic looks like a PH prob.

[215zealot]

yea i have been flushing the medium the last couple days with constant 5.5-5.8 light nute solution.

Is the PH raising back up or something??

[215zealot]

Now we are starting to think they are ZINC deficient, what do you guys think?????

[HippyInEngland]

PH fluctuates constantly, your most powerful tool is going to be a digital PH meter.

[Growdude]

Now we are starting to think they are ZINC deficient, what do you guys think?????

Dosent look like zinc, here a pic of zinc def.

How close are the bulbs?

[Kcar]

It also could be VPD or Vapor pressure deficit if your not
getting enough fresh air flowing through your grow.
It mimicks alot of Def probs.
Heres a link...

hXXp://forums.cannabisculture.com/forums/ubbthreads.php?ubb=showflat&Number=1354421&fpart=4

Scroll down about 3/4 of the way on page 4.

Let me know what you think...

[NorCalHal]

Do you foiler feed those? If so, ensure you do not do it with the lights on. I tend to agree with Growdude on it being a light burn.

[Kcar]

If it was light burn, wouldn't it be localized to the
leaves closest to the light? I have the same exact prob
as the OP, but there is no localization to the light.

[420thestoner]

i know this is off topic but why when you grow hydro your ph has to be so acidic?