If your healthy and eat drink right then your urine will be too and I would smoke it. Contains nitrogen and phosphorus
Collect egg shells ground them to a powder can use for calcium top dressed.
Can also use vinegar with eggs powder to react with shells and use that solution.
Epsom salt for magnesium and sulfur
Bananas can soak peels in water for a day and strain off and use for potassium phosphorus and calcium
Start a compost pile for you non meat non dairy food scraps and yard waste and that can be used.
Ashes from the fireplace or outside fire
Many options to use from around the house
Things that you may need outside of these can be sourced from many sources on line.
I like getting the down to earth brand dry amendments they are a responsible company been around since ‘77
Hope this helps