Can you identify this plant.

it is an anual called Clarkia. It is a very pretty flower [in my opinion] that will unless you dead head it come back year on year. they are in a range of pinks/cerise.

I can see some nice seedpods there. Let those ripen and sow in the autumn where you want them to grow. They don't always come true, so you may have a nice range of other colours too.