Nitrogen toxicity?

Yes the tips of the leaves doing that is sign of toxicity. lessen up on the N in your feed and it will stop happening, but the existing damage is already done and nothing can be done to fix it on the older growth. Only will be fixed on new growth. Good Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

Se n ai pas bien grave et je pense à se stade La plante va utiliser l azote (il n y a pas de brûlure à l extrémité des feuilles chose qui arrive en premier en général quand il y a sur fertilisation ) Et la forme des feuille vient du fait que c une grosse indica tu verra quand la plante aura une semaine de plus les feuilles seront normal ..je ne te conseil pas de faire un rinçage achete un testeur ph / ppm et quand tu prépare tes nutriment tu vise (à se stade de la veg ) entre 600ppm et 800ppm poyr un ph de 5.8 à 6.2 max en vegetative après e floraison tu peut monter à 1200ppm et 6.5 ph voilà en espérant sa va t aider n hésite pas à passer me voir si tu a des questions

Yup, you're right, it is a nitrogen toxicity but I was puzzled as to how this occured because between the Grow Big and the Fish Shit, you're really not giving it too much nitrogen at this stage of growth... but then I saw how much you were watering them and the answer came... You're growing in a 5 gallon and only giving them 1/4 gallon of water/nutes a day - all the nutes are stacking up in the soil and THIS is what is causing the problem. When you give plain water, you need to make sure you get at least 10-20% runoff... this clears out the soil of excess nutes and salts (not ALL but just the excesses that are building up). In a 5 gallon pot, I would be giving them double the liquid you are giving them per day. I also, whether watering or feeding, put a saucer underneath to catch the runoff and will let the pot sit in the runoff for a good 15-20 minutes - that excess water or nute solution is usually soaked right back up into the soil and if it is, I give the plant some more... I keep doing that until the liquid is no longer being soaked back up and then dump what's in the saucer because you do NOT want wet feet! Make sure you let the soil dry out completely before giving anything more. What you need to do is to clean out the soil with a good flush.... for your pots, that means 15 gallons of pH'd water through each one with 1/2strength nutes in the final gallon... then let it dry out before watering them again ... This should take care of the issue and those lovely lookingi plants should be much happier! Good luck!

High Ryanh, Yes you are 100% right that this Nitrogen toxicity. This is the result of the plant getting too much Nitrogen (usually from too high levels of nutrients overall, or by using a Vegetative nutrient in the flowering stage). It causes dark green leaves and curled tips (“the claw”). One of the main symptoms of a Nitrogen toxicity is curled tips (“the claw”). And that claw is pretty obvious when I look at your pictures. You need to flush the soil and after flushing give less Nitrogen nutrients. You can do this flushing by slowly pour water pH 6.2 onto the top of the soil, allowing it to drain freely from the bottom of the pot. Pour slowly, so the water doesn't overflow from the top of the pot. Use approximately four times the pot's volume in water to flush the soil. For example, use 1 gallon of water for a 1 quart pot. After the flushing you need to let the soil (almost) dry out completely. And from here you continue your grow as you did before but now without the Grow Big nutrients because they contain too much Nitrogen!!! Happy Growing! 😋

@ Ryanh1990 Looks ok really, perhaps a little "mutating" at the tips of leaves from a few weeks ago. The rest looks fine. Perhaps a bit thirsty...they really start to go through the water at this stage. Perhaps they were asleep when you took the pics? Sticky Buds!

P.s if your doing organic like you should you should never flush or water to runoff. Add Humic acid if small nutrient burns occur, this will give the plant a method of disposing the salts by natural means.

Reading growergrannie is like scraping my eyes out with spoon, such flimsy Information. Your leaves are heavy with water, wrinkled and droopy but healthy. Photosynthesis is determined by how much light there is and more important and lesser known is leaf surface temperature. Optimal photosynthesis occurs at 86. Plant growth is collection of 9 cardinal rules. If any one of the rules runs 10% the whole plants grows at 10%. Set ambient to 80-82 and lower light until top of canopy reaches 86 but no higher. Highly unlikely you will ever exceed 2000 ppfd unless you have extreme lighting. If temperature is too much of an issue setup a fan to blow air across the leds when lights on removing heat radiation as a factor. With the increased photosynthesis, perspiration will double time and water uptake will follow suit.