This is from an ILGM Purple Haze seed. It was started indoors in Feb and planted outdoors 3 wks ago. Yesterday I did a major pruning because all the nodes had grown so tight together, it was super dense.
Soil is a mix of peat moss, lime, perlite and dirt from decomposed leaves and water is from my well.
I don’t think it’s a cal deficiency since I’m on well water (northern Illinois) and kinda looks like Rust disease but it doesn’t rub off. Here’s a microview from the underside
It’s had 3 weeks to settle and was thick, lush healthy til yesterday’s pruning. The last couple days have been 90 degrees, so heat stress is possible, but unlikely