It really depends. My first tries at flower photography were with Fuji Superia 100 but on reflection the colours are a little garish (especially in bright sunlight) so I will try something a little more muted along the lines of fuji reala. As I am new to colour printing I used Fuji Crystal Archive paper as it was quite inexpensive, bearing in mind I would be throwing a lot a way until I got the hang of printing. It is actually very nice paper with quite robust colour saturation. I will stick with it for a little while before experimenting.
Actually my colour appreciation is pretty unrefined having spend the vast majority of my photographic time doing monochrome. I need bold colours to attract my attention. I got into flowers during a visit to the orchid house at my local botanical gardens when I lived in Edinburgh. Hopefully if I can refine my colour vision I will diversify.