Dianthus Pink Kisses

I have just purchased Dianthus Pink Kisses and would appreciate some help and advice on how to care for it, as it didn't have instructions when I bought it and was the only one left (although the name was on a sticker on the pot). I have tried to look on the internet but could not find much information and also, my one does not quite look the same. The pictured ones seem to be very 'pink' with small flowers, whereas mine is almost white with a maroon centre and the flowers are approx 2 inches across! It has the most amazing scent, which is what attracted me to it. I was planning to put it in a container on the patio. It is currently in a 6 inch pot so I would like to know... what size container to use; how big it might get; what to feed with and lastly, is it easy to take cuttinggs from Dianthus?  Thanks