Yeah i layer my containers. Layer of pumice stone 1.5" then 60-70% ss. Then a layer of a just organic seedling soil i make. With exception of pumic stone been using it for years like this.
I started the molasses lile last few weeks of last grow. Thinking is was a defeciency but ut was close enough to just focus on finish line . but now same soil. No molasses and getting a little purple starting on stems again. Never had this issue.
Top dressed with dried ground rabbit poop,humic acid, bone meal, insect frass and a little bloodmeal. Im away so cant check my journals for ratios.
Back in. Last grow when this started happening and i first noticed the purple stems i wrote it off bc they were doing great and it just started getting really cold at nights so my temps were dropping into lower 60s, figured it was cooler night temps. But then right before harvest it started showing up in leaves. Everyone said i was so close not to worry about it, but mow im worried its going to happen again.
The new ones just got first full strength notg sample pack feeding for early veg., photoplus, sl100, great white. And they each got 2TBL of that top dressing i made up. What do u add specifically to your ss for the P and K ? One if my journals has posted my recipe, and it normally goes in compost tumblers for 90days. But like a said last batch(one causing issues) didnt have it all and wasnt cooked as long. But it did have all the basics?