I killed a bunch of peppers and a few tomatoes following the Osmocote dosing instructions. I suspect the heat contributed too. Hot batches of mix with Osmocote remain that way for quite some time.
I mixed a large batch and ended up having to remove the stunted plants, flush the roots, dilute the "hot" mix with its contribution being around 1/3 of the volume, and that seemed to do the trick.
The concept of a "fertilizer strip" on top of the mix has been problematic for me, so now I mix it thoroughly.
For this year I used Osmocote sparingly and the plants are digging it.
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