Jaunissement, excès ou carence ?

bonjour des USA. j'ai déjà eu le même problème. 99% sûr que c'est le pH du sol qui est éteint. si vous vérifiez le ph de l'eau de ruissellement. l'eau qui sort du fond du pot lorsque vous arrosez, vous verrez que le pH est probablement inférieur à 5. si votre eau du robinet a un pH d'environ 7 à 9, je continuerais simplement à rincer le sol jusqu'à ce que le problème cesse. j'espère que cela aide. De plus, lorsque cela m'est arrivé, cela a commencé à se propager lentement à travers toute la plante le premier jour, puis après 2 ou 3 jours, c'était sur presque toute la plante et si elle se déplace rapidement, il y a de fortes chances que ce soit le même problème.

N/P/K/Ca/Mg/S -- Nothing prevents you from having toxicity in one and a deficiency in another. All need to be in a 'happy-zone' relative to stage of life. Also, burnt tips can be caused by numerous things, even a S-deficiency. Looks like a potassium (K) deficiency. Possibly too much N, too - last picture is dark and a bit glossy. N inhibits K, so that could be part of it, but I think it's just exacerbating a shortage and is not the cause of all your visible k-def symptoms. you are in soilless, so this is a bit easier. Check ppms of what you give. I'd expect K to be 180, give or take. N at this stage probably 100ppm and possibly less. In the end the plant dictates. The individual nute ratios can impact each other, so having too much of one thing may require more of another to overcome the antagonistic relationship. But, if the overall formual isn't too esoteric, these numbers should be a good ballpark to make it a bit more of an educated guess than normal. pH somehere near 6 is fine. You go too low and you lockout Ca fairly quickly below 5.5 or so. 6.0 will not be the cause of any problem. My nutes automatically ph-balance to 6.0. 95-99% of plants pull off the same rez just fine and the 1-5% do well enough to not hand-water. Good formula = consitent results. Bad formulas can look great on a few plants and have problems with many others.

Hey pal. So, after looking through your diary and what you're using. IT'S your ph. You know 3 things you're using is meant for soil. And HAS no benefit to coco. Coco can't be enhanced. Yes, you can enhance roots etc. But, 3 things you've got. They're soil conditioners mate. And I see clawing on your leaves. So what's happening is. The ph is off from all thst stuff and mainly N is being taken up. Pull All your soil enhancers. And give a 1-3 ratio of grow/bloom ppm mix of 450-550ppm NPK feeds at least every 2nd day if not every. You can feed then do calmag or whatever. But pull most of that stuff. It's throwing off your ph.

It looks like you may have the start of nutrient lock out due to pH issues. Your best bet is to flush out the soil by watering pH balanced water multiple times and get roughly 30-50% run off each time. This will help reset the soil of any build up that may have occurred from the grow thus far. Proper watering techniques will avoide this. When watering, always water enough to saturate the soil completely and then have roughly 10-20% of run off water. This will prevent any build up in the soil. Hope this helps.

High Hix57, Stop giving the grow nutrient!!! Increase the bloom nutrient to 5 ml/L Increase Cal-Mag to 3 ml/L Decrease the seeweed to 2 ml/L pH around pH 5.8 Water till at least 30% runoff to prevent nutrient salts building up inside the coco!!! Happy Growing Buddy! 💚