You know what, since my Foliage Pro started needing intense shaking, started after the weather got cold, that my cuttings have some yellowing faint off coloring.
Recipe which involves Pro-Tekt has never let me down before, same growing media, etc. I will be storing next bottle inside for sure.
Makes sense that if those particles that settle out are minerals and are now no longer in the solution that makes it to the plant, possibly upsetting the balance.