What to feed early stages in flowering?

What would be recommended to feed during flowering/early flowering of outdoor plant in soil and pot? And how often?

Read somewhere that higher PK rating is better during this stage, but could not find any nutrience that has higher PK than N rating? knowing that flowering plants dont like N.

OR, should plant not be fed anything but water during this period?

your plants need more phosphorus and potassium when flowering,,,peace

Use 20-20-20 for growing. 10-52-10 for budding. You can get it at any canadian tire, zellers if not in stock just ask & they'll order it.