I read somewhere here and there, that companies making fertilizer produced much less since last year. This was due to the high(er) energy prices which didnt allow them to make profit; also due to how the contracts were structured, the price was fixed, so increasing price was not an option, but no-delivery due to high energy costs was somehow permitted.

Since way too little fertilizer was produced, nothing can be done currently, prices for retail fertilizers go up, but the shortage is real.

Take this post with a big grain of salt, I do not have solid sources.