They grow these things in median strips and give them virtually no care whatsoever. I am sure you will find sun or shade, and from little water to total neglect, to be quite satisfactory. I hope your pot is large, and that you don't end up with too many volunteer seedlings growing round the garden :-)
Cheers, Jan

Elly, snap off the flower as it withers but do not cut down the flowering stem.

Being potted it will benefit from a light feeding on a regular basis.