[Jay_Buddy]

Is a fan hitting that leaf?

[calikush]

Possibly light burn, too high ppfd

[Thickems]

Sounds like light stress on top a thick canopy. Lowers are weak, tops are roasting.

[cerberus420]

I cycle down from 18 hrs to 12, and raised the light some, also cut off alot of fan leaves. The flowers themselves are actually still growing and is drinking about 50 fl oz, of water/nut mix. There is an exhaust fan, but not much blowing around, I was considering adding something else for that.

[Thickems]

Can you dim the light? 18 hours is great for autos, 12 hours you really lose biomass. I found best quality running 18 to 20 hours, under 500ppfd. Leaf surface temps can be checked. Dont want them over 84F. Get some air circulation in there. Not just mold but hot spots. Just a current to flow around.

[cerberus420]

120w too much for light with samsung leds? and I’m working on a circulating fan, hopefully home depot has one. I have a fan here but is too powerful even on the lowest setting. I can tell you that the temp gauge inside has never been over 80* more like 75*. btw, random seed, random genetics. it is a photoperiod, and the veg cycle was extremely short like barely made it six weeks. I did flip the light because the plant took off with ridiculous growth. I understand they stretch almost twice as high during flowering. I actually took the 12hr light cycle down to just 11hrs.

• This reply was modified 1 month, 1 week ago by  cerberus420.

[Thickems]

The hours will matter for phase of growth, i mis understood the 18 to 12 hour. 120w can be to much if it is to close and no air moving over the leaf. Yes most stretch 2 to 3 times their size in flower, about first 20 days is that phase.

[smokythebear]

if you dont have a fan blowing in there , get one

[retro]

check your leaf surface temperature, i don’t like mine over 84 deg. F.🍀

[one-eyed-cat]

@cerberus420 ThThis looks like it could be from low humidity and heat stress to me. You said your temperatures get up in the 80s but how is your humidity?

[cerberus420]

can’t speak on humidity readings, but I know it isn’t to dry. also heat isn’t a factor, so I dialed the lights down to 100w and there’s a circulating fan articulating. doesn’t look like it is getting worse.

[one-eyed-cat]

Looking at this new picture with the curled leaves. The leaves behind it are showing spots and signs of PH fluctuations and PH problems. so there’s definitely something wrong in the root zone

[cerberus420]

thanks for that, think I can get away with just flushing more with water for now. I do have ph meter somewhere, but I feel like the strips could be better.

[New Leaf]

I agree with oneye. Im leaning towards root issue instead of heat issue. If it were heat, you’d see other signs along with the leaf curl. What kind of pot are you in? Fabric? Is your grow in the basement? I use frabic pots and always put them on those plastic plant stands that raise the pot a couple inches and allow the roots to air prune. Before i did this the roots would grow along the floor of my tent and i would get some leaf curl from those uphappy roots.

[cerberus420]

little bug, but there’s quite a bit of them, I exposed the plant to some outside sand/soil to get rid of a gnat problem. they are not earwigs.. but I’m only killing them physically when they run up the sides when watering. flowers are still growing. They are in 5 gal pots, was successful in the past with them.

[Culver-Creek]

Chat GPT says (for what it’s worth)

The insect in your photo appears to be a <strong data-start=”41″ data-end=”56″>rove beetle (family <em data-start=”65″ data-end=”80″>Staphylinidae).

Here are some identifying features that match:

<ul data-start=”135″ data-end=”308″>

[Thickems]

Rove beetles will eat fungus gnat eggs and larvae. They are beneficial and will die out as pest vanish. I just battled fungua gnats in my grow with these. Gnats gone within days. They help for aphids thrips and other soil pest as well.

[cerberus420]

progression of the plant stress, still leaning towards nutrients being too much, but all of the colas look good imo.. I use (mono potassium phosphate. like very small amounts of 0-34-52 I believe.

• This reply was modified 2 weeks, 2 days ago by  cerberus420.

[New Leaf]

Also might want to check for soil dwelling pests

[ohigrow]

I would also say rove beetle. While beneficial, I’d take it as a sign there are other pests. Most likely brought in with the outside soil/sand. Maybe it’s just the fungus gnats but I’d do a thorough check of leaves and scope out the soil. Neem oil works pretty good on the gnats.

[cerberus420]

seems pretty normal growth