I have seen it being used for [name_f]Rose[/name_f]- names, as a rhyming nickname (Rosy → Posy), and I suppose it could technically work for any flower name—literal ones as well as [name_f]Florence[/name_f], [name_f]Flora[/name_f], etc. 
[name_f]Amapola[/name_f] (the Spanish word for “poppy”), [name_f]Proserpine[/name_f], and [name_f]Apolena[/name_f] or [name_f]Apolline[/name_f] come to mind as well, but I am not sure if any of them would be your style?