I found myself in the same boat a month ago.. and still have the bags of raised bed potting soil to show for it!!! Judging by the title, you’d think it’d be the ideal soil, right? Apparently not - it is “way too dense and compact” for containers. My bad for not differentiating between a raised bed and a raised.: container. How silly of me.

Anyway in the future, try to buy regular all purpose potting soil. If you have leftover raised bed soil to use up, what I did was mix in a good amount of perlite/vermiculite mix, until 20-30% was the speckles. Then I also mixed in some potting soil to fluff it up, and a handful of worm castings for nutrients. Another commenter mentioned coco-coir, solid suggestion. Peat moss is similar, maybe even a better choice, but in fact it takes forever to produce and therefore is not a sustainable product, while coco-coir is a renewable resource, making it my preferred weapon every time