Schwarze Spitzen und Flecken nach Neemöl-/Kaliseifenbehandlung in der Dunkelphase. Schimmel? Dran lassen oder abschneiden? Bitte um Hilfe!

Not mold but dead tissue. Only ever use one product at a time and never spray plants with canola oil or other ghetto science home remedies. Use either neem oil as directed or potasium soap as directed and never mix the two together. Canola oil will likely clog the stomata in the plants leaves and is most likely the reason for the dead spots.

Neem oil is such a pain, noone cant get cold pressed, soap again has to be right, mixing and dozes varry and so on. I saw more damage from it than any solutions... Its recomended to mix small doze and apply on few leaves of plant, wait 24 hours , if all good - do big batch and spay all plant. That mixture is good for 4-6 hours only, thats why you mix twice. Looks like your plant didnt liked it at all ... Give time, its young plant, nothing is loat yet.

And you don’t want to apply anything if your environment is very hot or cold it can damage the leaves

If you keep your humidity down to 55/60% at least you won’t have a problem with mold in this stage. Doesn’t look like mold actually. But he sure to always have fresh air circulating! If you mist your plants with any solution you have to do it when the lights are off or Just before it gets dark. Even if it’s water. It can burn and damage the leaves a lot if not. I had much help with Neem oil, these guys hate it but it actually helped me to get rid of pests before. But you can’t over do it and I think I mixed it 0,5ml per liter. I always give less than the manufacturer tells you to give. I hope she recovers. Just watch the new growth if it’s nice clean and fresh you will be set. If the old leafs keep dying but the new is fresh just remove that old spotted leaf and I think you will be alright. Good luck my friend

I don't think that is mold. i'd use a real pesticide instead of some home remedy concoction. Pyrethrines kill on contact and biodegrade quickly. This too will cause some minor symptoms on the plant. The home remedy appeals to some people, but more often than not it's a urban myth or ineffective nonsense. Spraying random shit on the plant has more risks than benefits. I'd have to look it up, but if potash can traverse the stomata, you may have caused some nutrient lockout or burn. Those darker spots look like a P-deficiency symptom, which is not locked out by K but could be coincidental timing with your actions and unrelated 2nd issue. check ingredients of the neem oil. If it does not have 'azardirechtin' (definitely misspelled) it is not much of a deterrent to pests. "clarified' neem oil doesn't do much of anything. don't leave dead foliage around - keep the area clean. Rotting organic material is a vector for pests. Use Bti pre-emptively to kill pests whose reproduction cycle invovles larva in the soil. You often get this shit in the bag from the store you bought the substrate from, unfortunately.

looks more like necrotizing leaf tissue. I think something in that mix is not great for the plant and causing it to die. You will want to keep air movement up as well as that high RH in the dark phase can lead to fungal growth. You can spray with lights on if they are dimmed way down. but not if they are at full or moderate intensity. Neem has been getting a lot of bad rep lately for its issues with humans and how a lot of places have banned it on any crop that is consumed by humans. Mostly its active ingredient. there are many options out there for treating pests. I would look into some of them as a one stop kill option. Neem stinks as well and does not kill but fucks with the pests reproductive system, not a fan of it.