Upper Leaves Curling Down/Around Themselves on Flowering Silver Haze

[LlamaSchool]

SOIL:

How long has this problem been going on?
-Increasingly worse over 1-2 weeks
What STRAIN are you growing?
-Silver Haze (don't remember the seed bank)
What was the establishing technique? (seed or clone?)
-Seed
What is the age of your plants?
-approx. 75 days
How long have they been in the soil mixture they are in now?
-approx. 60 days
How Tall are the plants?
-approx. 3 feet
What PHASE (seedling, vegetative or flower) are the plants in?
-flowering, 25 days
What Technique are you using? (SOG, SCROG etc)
-sort of SOG
What size pots are you using? (Include how many subjects to pot)
-1.5 gallons
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?)
-1/3 Coco Coir, 2/3 FF Ocean Forest, Topped with EW castings
What Nutrient's are you using?
-FF Grow Big, FF Big Bloom, FF Tiger Bloom, Supplemented w/ MagiCal
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
-about 50-80 percent Fox Farms recommended dose
How often are you feeding?
-every 2-3 days (every watering)
If flowering, when did you switch over to using Bloom nutrients?
-25 days ago on start of 12/12
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
-no specific order, usually Big Bloom last because it is organic and clouds up the water making it hard to read pH
What is the TDS/EC/PPM of your nutrients used?
-unknown
What is the pH of the "RUN-OFF"?
-approx. 6.0-6.2
What method of pH test was administered? Using Strips? pH pen?
-dropper of pH color liquid
How often are you watering?
-every 2-3 days
When was your last feeding and how often are you feeding?
-every water, 2 days ago
What size bulb are you using?
-1 600 watt air cooled
What is the distance to the canopy?
-8 inches
What is your RH Factor? (Relative Humidity)
-40-60 usually
What is the canopy temperature?
-probe at the canopy reads up to 80 degrees, occasionally more
What is the Day/Night Temp? (Include fluctuation range)
-day in the tent (not at canopy) is in low-mid 70's; night in the tent goes down to 64-66
What is the current Air Flow? (cfm etc.)
-unknown, using a large squirrel cage fan set on low to pull air through a carbon filter (in tent) and across lamp, exhausting outside of tent
Tell us about your ventilation, intake exhaust and when its running and not running ?
-see above, running 24/7; also have a small oscillating fan blowing at the plants
Is the fan blowing directly at plants?
-yes, the oscillating fan hits some of the plants and moves all leaves at least slightly
Is the grow substrate constantly wet or moist?
-no, the top dries out a bit between waterings - the pots are very small
Is your water HARD or SOFT?
-unknown, probably fairly hard
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
-sometimes distilled, sometimes spring, usually tap water allowed to sit out for 24-48 hours
Are you using water from a water softener?
-no
Has plant been recently pruned, cloned or pinched?
-yes, clones taken 10-12 days ago
Have any pest chemicals been used? If so what and when?
-no
Are plant's infected with pest's?
-no

The newest growth on my Silver Haze curls under itself into spirals. This happens almost exclusively on new growth but a few lower leaves display some symptoms. This is the only plant I have that shows this and it is also my largest plant. I have another Silver Haze that is almost as large and it shows no symptoms but it displays a broader-leafed phenotype.

Could this have to do with being rootbound?

 

[spyvsspy]

I think you are having some Nitrogen toxicity and you pH may be a little off. I think your regiment of Grow Big, Big Bloom and Tiger Bloom EVERY watering may be too much and the claw is classic Nitrogen toxicity. I had a plant that looked similar when I administered a Guano Tea super high in N.......
I would flush the hell out of it with 2x the capacity of the container with clean, pH balanced water and the chill out on the feeding, maybe every other watering at least.

Good luck, spy

 

[Crush]

Ola!!!

What you are experiencing is 'bull horned' leaves. Bascially, the fan leaves curl under like the shape of ram's horns.

And what causes this? -> too much N.

The leaves will go a dark green and ram horn over. Immediately move to water only and let the plant recover. Also don't be suprised if some major burn and/or spots happen all over the place in the coming week.

In a week the new growth will be fine and you'll be back on your way.

Sativa's are very sensative to nutes and should be a more lime green as compared to an Indica which has darker green leaves. Go with half the nute mix you were using when you start feeding again, maybe even a 1/4.

Your leaves should look a stiff and a bit dry and a bit lime green. This is very hard to achieve indoors with a Sativa so don't expect perfection.

 

[phup]

Leaf curl on a haze like that is over fert for sure. Too much N. Crush called it. Flush the hell out of it and measure the ppm's in your run-off. Continue flushing until they are under 600 at least.