My understanding is that the open wounds created by the critters feeding allows the fungus into the plant. I have only seen this outdoors. Most often just as budding starts. I loose a few branches almost every year. Damn Gypsy moths here. But it something to consider in your quest. I cut it off. The entire branch. Doesn't re-appear after.
I used to use temp stress to lock up P to induce purple. 80's profit scam. Ashamed for it now. That started in the leaves and took days in the low 40's. There are a few possibilities.
Always good to hear from you @MICHI-CAN - yes, I use a high Phosphorus when they are taking off in flower, that and the dip in cool weather was what caused the leaf thing. I think the plant that turned purple is just some strain of purple kush maybe?? heres what happened to one leaf on my indica, im hoping that those purple buds fatten up a bit. Last year I had some purple that just looked ratty, I dont know how to describe it, no density, just thin fluff, was def weird. Do this long enough and you see strange things, I guess.
Thank you. Good morning or afternoon to all. Take everything you know about plants as standard not law. Seen some unexplainable things in my journey in all plant types. Sometimes it's total chaos. Others and it is that gift you never got for X-mas. Keep growing and learning. Above all help when and where you can. Karma helps. Peace.
These days if you want purple it's easy to get strains that purple on their own. 80's profit scams were common. We used to steam weed to add moisture which added weight. I'm not ashamed of it either. I was a young punk dude trying to make some money. I did what I did.
That does look like it could be some form of fungal issue. I'd remove it. If it was nutrient or temperature related it would likely be more widespread than just a few spots here and there on the plant.
These days if you want purple it's easy to get strains that purple on their own. 80's profit scams were common. We used to steam weed to add moisture which added weight. I'm not ashamed of it either. I was a young punk dude trying to make some money. I did what I did.
No need for tricks to get purple when there are plenty of genetics available that purple on their own these days. PCK and anything with it in it's lineage will give you purple all day long. Top is a PCK. Middle is a Congo hybrid with PCK in it. Bottom is a PCK in flower. Green leaves but purple bud.