My first PRK was in organic bagged soil, same as my 3 half and half and showed mutations that the h&h don't have. The other five are in inert calcined clay and three have showed mutations from the first set of true leaves before getting the first fertilization.Has anyone grown prk organically?
Sometimes finicky strains do better in organic soil where they can self-regulate (to a point).
I'm running 5 'half and half' right now and they are also showing signs of sensitivity. No burnt tips, but they are twisting a little.