Geum 'Prinses Juliana'

Mmmmm, it's never easy to answer a question like this "blind". I've got 4 different Geums and they're all in flower right now.

Since it's newly planted it might just be shocked and sorting itself out. If the leaves and stems are looking healthy and perky I would say you having nothing serious to worry about. Have you checked for signs of any new buds?? Since it's newly planted I take it you've been watering and feeding it regularly, if not it would be advisable to do so:D
So if it is looking okay and healthy I would have a bit of patience and it will flower eventually.:D