I like it much better than
Summer (the -er always bothers me) or
Autumn. I do see why some people might not like it. There aren't a lot of girls' names that end in -ng, and not too many starting with an awkward bunch of consonants. I love the unusual sound of it, though, and I agree that it certainly brings up images of flowers and emerging life- an image I love, since where I live there's about a week of that between freezing and boiling temperatures! For some reason,
Cherish Spring,
Idony Spring, and
Anwen Spring come to mind.