I live in apt. I want to find some suitable flowering plants (yr. round) for pots.
What Plants (Full Sun) Are Best in Pots?
Certified GKH Gardening Expert
The following articles have some suggestions: https://www.gardeningknowhow.com/ornamental/flowers/fgen/full-sun-plants.htm
https://www.gardeningknowhow.com/special/containers/hanging-basket-plants.htm (under sun loving)
Keep in mind that flowering plants do not remain this way year round, though many can be overwintered indoors--they must still go dormant.