Can they still recover?

Hello mate, the problem here isn't pH, or for saying better not directly. You are using a bio/organic feeding so you must say that if you want mantain the balance of your soil you must check the composition of your water (tap water) and must be sure that the Ca/Mg ratio is 3:1 or 4:1. Another important thing is to create a favorable environment to process organic substance. Good luck and happy journey!

Potassium deficency all the way. Nothing else and too much light right mow cuz she cant breath enough cuz of the Missing k she ist getting too hot

Genetics could be the cause of the yellowing. If everything is dialed in ( nutes, ph, lighting, watering, etc) and the leaves are yellow and crispy just let them fall off, plants lose leaves all the time. Also increasing the light intensity has this effect. So if you’ve increased light intensity recently dial it back. I’ve had strains do the same thing and they turned out fine. As long as buds look healthy just keep doing what you’re doing!

I had a similar problem in mine with hydroponic . In my case the ec was too low (1,1) and really really a few of CalMag . My ph was unstable . Once I put the ec around 1,7/2 she started bulking hard . I am a new grower so idk am not sure if u have the same problem I had

Hi Tommy. I used to grow with Biobizz as well using their light mix. I ran into similar problems and tried fixing it for years. In the End it turned out to be a pH lockout. Which led to same symptomps yellowing leafs, brown crisp spots. In my case the plant soil always turned acidic pretty fast (i a matter of 3 days). So i used a big amount of pH up to keep the runoff around 6,2. When I did that I did not have this issue again. I dont think your symptoms are caused by humidity / too much / too less nutrients in the soil. For this run I would give the plants normale nutrient solution with pH 6,6 and then look how the pH of the runoff turns out to be and react acording to that. In my case the plants needed one week of stable pH to recover a bit. (Harmend leafs will fall of anyways) Since measuring runoff every time is a huge pain I would just recommend switching the nutrient brand. I tried contacting biobizz with this issue and never got a answer. And for the money u need to pay if u use their full regiment of fertilizers thats just a joke.. I swithed to anorganic fetilizer and it was a huge relief since I dont runinto any of these problems anymore. You can still keep this run going. Even if you got some loss the buds you have will probably turn out fine. Here is a website for future problems since most answers to problems are strongly misleading: https://www.growweedeasy.com/cannabis-plant-problems/calcium-deficiency Good luck

lower ph to 6.1 ; check if your airflow is to much (airburn!) or you dehum to much. then give just water for a week , remove everthing what is looking like brown creapy stuf eating your leafs , just yellow can stay but you need to cut the leafs and remove the damaged tops to rescue them - otherwise you can remove them all,too if you want. everthing what is clearly damaged or dryd out will never heal again. it is just a nest for all kind of fungi. a litlle bit it looks like the plant has not the right conditions. temp /Hum over day and night ? what kind of airflow or dehum? ....

Yellowing top-down is weird. Manganese or Zinc deficiency? This would be rare... soil should come with plenty. if that is coco or soilless, one of your fertilizer products needs to provide the trace elements along with primary/secondary nutrients. yeah, i'd assume lightmix isn't contributing a whole lot of nutrients at this point. You fertilizer to provide 100% of nutrition.. it's not just add this here or there and blast it with p/k in flower. don't jump to flush a plant unless you confident it's a toxicity.. flushing is stressful and should be avoided. you definitely needed to react sooner than this, but reacting before you can be confident of the answer almost always makes things worse.

Hard to say what's going on here looks like deficiency and over fertilisation but something needs doing quick time or you have lost all the leaves, if you have "flushed" then you must have over fed already weak plants, just give water this time and observe

hey 👋 your plants look like they’re starving; are you giving them flowering nutrients? u can still save them, but act quickly ; your buds and harvest will suffer if this condition continues...