Multiple Problems

[Dreadscale]

Hello again everyone!!

I just put my plants into 12/12, 3 days ago and changed the nuets and I have got about 3 problems already.

Mites - I have dealt with and will continue to.
Yellow to brown spotting on middle leaves. They also are getting discolored edges.
And also leaf edges are curling and some appear ragged or torn.

Using:
Fox Farm - Ocean Forest Soil
Just fed Sunday- Fox Farm Tiger Bloom, Big Bloom, and Open Sesame at 1/2 recommended dosage. Neut PH 6.0
Temp - 85 hi, 70 lo
Humid 30%
Lighting - 1000W HPS 36" above tallest plant
Vent- Ceiling exhaust 12" above light, 20" box fan blowing horizontal above plants and below light, active intake "exterior air from under house" exhausting directly in front of box fan, 20" box fan outside of room blowing into room directly on plants. during lights on
Lights off - passive exhaust and intake with 20" horizontal blowing

I had a hard time balancing PH and added a lot of PH up, mostly potassium. Thought I may have OD the Potassium.
Found this on Potassium toxicity in Greenmans Plant Abuse.
Potassium (K) Toxicity
Usually not absorbed excessively by plants. Excess potassium can aggravate the uptake of magnesium, manganese, zinc and iron and effect the availability of calcium.

Calcium is the only nuet not included in this weeks feed schedule so I fed today with 1Tbl spoon per gal Molasses, trying to add some Calcium.
The curled edges and spots seem to be just on the Sativa, and not just the top.
Will PH soil after it dries up a bit. Forgot to.

What do you think?
All input is appreciated, THANKS.

[Rusty Trichome]

They look fine to me. :jointsmile: If the 'problems' showed, after switching to 12/12 and changing the nutes, chances are it's adjusting to the situation.
But, when I make my bloom nutes too strong, I get slight leaf-edge curl like yours. (the edges look almost sharper)
Keep an eye on her after the next watering, and after next round of nutes. The sativas may have slightly different nutrient needs than the others. (may need to adjust nute strength) No way to check run-off ph?

The days before you put her into flower, when did you last give the veg nutes? Did you start the bloom nutes the same day you put them into bloom? (could they be a bit overferted from the two?)

How does the Open Sesame work? Worth getting? I use the 3-part Fox Farms (G-M-B) but am curious about their other products. Also thinking of getting the Sledgehammer for salt build-up.

[stinkyattic]

Looks like it could be the start of Ca def. It's not going to come from molasses in any useable amount; you will need to use CalMag if you are treating a deficiency.
In any case, I would lose the Open Sesame until you get the pH issue sorted out and stick with your base nutes, flush out the plant in case you DID OD it on K from the pH battle, and feed with just your base nute at correct pH and a little weak for the first watering.
Also heat stress; switch from active intake to active exhaust with passive intake for more efficiency.

[grey1223]

I'm not sure I'd give those nutes at 6.0 with your setup. Seems 6.5 would be better with the OceanForest.

[stinkyattic]

^^^AGREED! ^^^
Didn't even notice that! Definitely go up to 6.5, 6.6 ish!

[Dreadscale]

Thanks for all the replies.:thumbsup:

I usually try for 6.5 but just started the 6.0 thought I may get better results. And with my last mix I was glad to get it that high. Will go back to 6.5 as of now.
Thanks for that tip grey1223.

stinkyattic am getting some cal/mag, I was leaning towards Ca. deficient but didn't know. Today looks like going mag deficient.:icon506:

Rusty Trichome I started the bloom fert same day they went into 12/12. Last grow fert was a week before that. I PHed the run off and it is about 6.5.
As far as Open Sesame the jury is still out. An expert could probably pull it off, but you can see I'm struggling.

Considering a good flush to start over, and repot from 3gal to 5 gal pots.
This morning they are not looking any better.

THANKS LOADS FOR THE HELP ALL!!!:hippy:

[Rusty Trichome]

<doh> Sorry, I thought you said you were adding molasses and calcium, which sounded fine. Molassest has some calcium, but have never heard it used for corrections.
WHFoods: Blackstrap molasses (http://www.whfoods.com/genpage.php?tname=foodspice&dbid=118)
Are you letting the soil dry out properly between waterings? I've seen spots like that, on plants with overwatering problems. I ran out of perlite a ways back, and had just got a 15 lb box of worm castings, for ammending the soil. (not as the medium itself, lol) Made a muddy mess that was a bitch to keep on a regular feeding/watering schedule. Ended-up with minor root rot but finally figured it out after transplanting to better soil mix.
Just a thought.