This is a bit of a experiment. I just grabbed some soil from the garden. I live in a very chalky area so that might make a difference!
The weeds have sprouted very well from the soil (and been removed) the North Thuderfuck however doesn't seem so happy. I turned down the light as I did have some leaf curling and the leaves are a bit sickly looking.
See how it goes!
I have the same crazy purple color on my north thunderfuck auto.
I'm calmed down seeing your pics. I thought I did something wrong.
The buds on mine are getting dry but the trichomes aren't ready at all.