I got to take this photo taken from Samsung Galaxy S7 in the backyard garden of our neighbour. This flower is 1 of the common flower here in the phillipines. It grows everywhere with other shrubs and no strict care needed.
Single petalled Zinia
It also comes in double petals and single petals with different colour.
When the flower gets pollinated with the help of bees it will turn brown and you can get its seeds and you can pour it in the ground.