OK, I want to plant some of my potatoes this week.
What should I use as fertilizer? Should I put bone meal in the trench or the bottom of the bucket?
Look for a 5-10-10. LOW in Nitrogen, and higher in both Phosphorus and Potassium (aka, Potash.)
So, bone meal will be good, but also add Muriate of Potash. Most garden centers will sell either of these components separately, or have a blend of fertilizer specifically for root crops.
You can use the same combo on anything ‘root crop’ such as carrots, potatoes, onions, kohlrabi, turnips, etc.
Even a liquid TOMATO fertilizer would be OK for growing potatoes in a pinch - they’re both in the Nightshade family.
Just remember: as little nitrogen as possible for potatoes. Too much and you’ll get beautiful, lush plants but little or nothing BELOW. :)