Yo, tip burn might be because of so-called "Guttation" ((c) ChatGPT ) and not the nutrient burn, I learned this about two days ago after watching "We the growers" podcast, ep 12
Here's what robot says about it
"Guttation is a phenomenon in which water droplets form at the tips of leaves as a result of the plant's root pressure. This usually happens during the night when transpiration rates are low (transpiration is the process through which water is lost from the plant to the atmosphere). This pressure forces some water up and out of the plant, resulting in droplets forming on the leaf tips.
In the context of indoor cannabis cultivation, if these droplets collect and remain on the leaf tips as the lights come back on, they can act like small magnifying glasses, focusing the light onto a very small, localized spot. This can cause "burn" marks or discoloration at the leaf tips, which can sometimes be mistaken for nutrient burn.
In some cases, this process can also bring out some of the nutrients from the xylem vessels, which can accumulate as a residue on the leaf surface, potentially causing some additional burn or toxicity symptoms."
Awesome job so far! Keep on going :)
@bobtheblob thanks for the hint! I am keeping an eye on it, since these have many many more weeks to go. First time trying to grow such a long-flowering strain.
roberto420
