Some of these are just "out there" but many I've heard often over the years.  I have a granddaughter named Willow, so that's a good one!  My husband (who is in his 60's too!) has a friend named Basil (I always hated that name but he's a great guy!!) and of course Rose (and it's variatios) are always pretty. 

Most of these really are girl names, tho.  Could you even imagine a boy named Zinnia??!!  Well, in today's society, maybe . . .

https://www.gardeningknowhow.com/garden-how-to/lifestyle/garden-names-for-babies.htm