one. Three of the treated plants had slightly pale lower leaves compared with the untreated row mates. Not yellow enough to scream disaster, but enough that I wrote it down. The untreated plants looked a touch steadier and more uniform.
I also noticed the treated soil crusted a bit differently after a hot, dry stretch. When I gently pulled back the top layer with my fingers, there were still visible bits of tablet material that had not fully disappeared. That told me the tablets weren’t acting like a true fertilizer