Great thread!!!
I have been lining my pots with wood that has been soaked in a solution of 10-10-10 all winter, and Bio-Char that is charged with urea. We will see what happens.
I do have a question for the container folks, do you replace the mix every other year?
I was thinking about replenishing with my compost and growing a cover crop in the pots in the fall.
My potted plants usually get a shot of osmocote or 10-10-10 three times a season after bloom.
Wood, Charred wood, soaked in 10-10-10 solution all winter
Drip irrigation to pot.
Compost, Bio-char, Rabbit Manure and Bedding, old potting soil, some old clay soil, coffee grounds...pray for me!!