help w/pic

Coco / perlite 70/30.
PH 5.8
Go box nuets.
600w has
60 day in to flower.

I'm lost on what this issue could be. The leaves on my plant started to saw blade up. I thought it could be heat so checked that tent is only sitting at 80 with light on. Has fan blowing it. I tried flushing it after I thought it was a cal/mag issue there wasn't any change so I flushed it using 5 gallons of phed water to Reballanced the ph. Then gave it a light feed and it only spears to be getting worse.

2 of my small Western Winds (kali mist) are experiencing this also. No idea what it is... my other 2 WW are doing fine under the same conditions. The only difference is the ones affected are a bit root-bound, as I 've been lazy about transplanting them. Hmm...

i venture to say it is a PH issue. Can you check your runoff? That far into flower locking out nutrients wont ruin your harvest. Those look close anyway. Id try to adjust the PH of the soil.

The run off at first was really high. Over 7.8 with about 10k ppms. So when I flushed I got the runoff to 6.4 and a normal ppm for my water. Then gave it a light feed in hopes the plant would go back to normal but no such luck even more leafs had started turning up. The rest of the plants are fine tho

Any ideas

I have the same problem with 2 of my plants. They need to be transplanted a while ago, but i got lazy. Been using pure H2o for the last 2 wks so it's possible I have N-P-K deficiencies. It's close to harvest and the bud looks frosty. The rest of my plants look fine. I'm not going to worry about the leaves this late in the game. Good luck with your grow, Dev

Yeah ty. I hope it just gets better and doesn't effect my harvest. Would of liked to know how to fix it case it effects my other 4 plants that aren't as far along

So it's now getting worse both of my snow whites are doing it and some of the bud leaves are now turning yellow and folding up. I'm not sure what to do at this point.

I hope the app works to post my comment this time!
Leaf edges curling up like that is a sign of heat stress. Make sure ya raise the light to 12-18 inches above the canopy. Also make sure you have a fan blowing on the top shoots ..... How's the rh in your grow room?
Also, leaf tips curling upward like that (especially if turning reddish brown) is a sign of mag deficiency to me which can happen towards the end of flowering too! Also generalized yellowing can also be a normal N def towards the end of flowering! Now, with a pH as high as yours, I'd assume the plant should be able to uptake mag, of mag was available to her for absorption!
BTW heat stress will also accentuate the signs of other deficiencies ever if they're mild!
This is based on my experience and readings. Don't take this definitively and use this info to brainstorm and get to the bottom of your problem!

https://www.rollitup.org/index.php?threads/841773/

PH needs to be fixed to the best of your ability (difficult to do this late in the game), but it looks like nute burn. Id flush and dont feed again until the pot completly dries out. Ive done it before and trust me your plants wont starve in the short time it takes to dry up the pot.

Updated pics

Curling up in "canoe" shape is always heat but looks like a few things combined. i would flush till harvest, for the ones at days 60+. and maybe go easy on the nutes for younger ladies. What do you use for circulation besides the fan blowing over?? input output? co2?

green_machine_two9er said:

Curling up in "canoe" shape is always heat but looks like a few things combined. i would flush till harvest, for the ones at days 60+. and maybe go easy on the nutes for younger ladies. What do you use for circulation besides the fan blowing over?? input output? co2?

Click to expand...

Well there in a 8x4x7 tent. Have a direct fan pulling air out of the tent 450cf 1 fan moving back and forth. And 1 static fan pulling air in at the bottem

DevChronics said:

Well there in a 8x4x7 tent. Have a direct fan pulling air out of the tent 450cf 1 fan moving back and forth. And 1 static fan pulling air in at the bottem

Click to expand...

seems like plenty of air. your useing HPS maybe its just to close?

It's almost 2 feet from the plants and the 2 effected plants are the furthest from the middle. The plant with the biggest issue is over 2 feet from the light at since it's much shorter then my other 4 plants on there

I'm not 100% on what the issue is but I do agree with few others who say it looks like u suffering from few minor problems at once.

I'd agree with temps, tho if ur ambient tent temp is ok then maybe its just lights too close and possibly from ur pics it looks maybe like ur lower leaves aren't curling as much, and symptoms are stronger nearer light, so distance might be an issue. (Correct me if I'm not seeing ur pics properly!)

More with temps tho, I think its more likely gonna be they possibly also stressed & inclined to curl cause of difference in day/night temps. I can't see u say how big tent is but a 600W will heat well in day and combined with if u got ur fans running all night then they are good, strong fans & could be jetting much colder air over them all night. So maybe either turn off fans at night, or else make sure the room they inleting from is at least 18 - 20 degrees Celsius all night.

I find keeping the difference between night and day temps at no more than 6 - 8 degrees C keeps them happy. Ideally u want warmish room temps all round, but if u have got high day temps then its much better if u raise nite temps to within that 6 - 8 degree window again - they can handle overall higher day/nite temps far better compared to massive temperature drops & spikes.

And I also agree is some sort of deficiency and it may or may not be caused by pH, tho ur stated readings did sound high. I'd say double check pH & adjust accordingly and browse on here for leaf pics to hopefully diagnose what's it missing, tho this late in flowering, if its not nute lockout then it probably is they just ate the soil dry of most things, and especially since those buds do look quite fat already!

Plants do turn a bit more delicate and pernickity in late flowering so overall I think u just suffering some sort of stress which is accentuating nute defs and possible pH problem.

Ah, just seen ur tent size, so maybe its not ambient tent temps then if only 1 x 600W in there.

Yeah the 600 is only cover 4 feet of the tent the other side is just used for storage of the nuets and water

Fair play man, and possibly ur static inlet won't also be "jetting" cold night air in then (lol!) but certainly overall I'd say check day/night temp difference. Use the Min/Max setting on ur thermometer if its got it. I love checking my min/Max numbers tbh!

Otherwise its maybe more likely gonna be a full-on nutes/pH problem, in which case I don't know enough specifics to direct u on specific solutions I'm afraid.