Jacksonville never has a dormant month, and that quietly changes what a just-because bouquet means here. Camellias open in January while the rest of the country is under salt and grit. The azaleas in Riverside and Avondale go off in late February and March, the whole city's crepe myrtles run through the summer, magnolias come in around May, and by autumn there is still something in bloom on every third block. Flowers are ambient in this city rather than exceptional — the Cummer Museum keeps historic formal gardens right on the river on Riverside Avenue, the Riverside Arts Market sets up under the Fuller Warren Bridge on Saturdays, and half the front yards in the historic districts are somebody's ongoing project. Which means sending flowers to a Jacksonville doorstep on a Tuesday for no stated reason does not read as a grand gesture that needs justifying. It reads as normal. That is the whole case for the just-because order: it is the one occasion where the point is the absence of an occasion, and this is a city where that lands easily.
What people actually send these for, in rough order of volume: a friend having a bad month, which is the order most worth placing and the one most often talked out of; a thank-you to a teacher at one of Duval County's schools, where deliveries go to the front office rather than the classroom and get walked back at the end of a period, so the teacher's full name and the school's name both matter; a new-neighbor welcome, which in Springfield, Murray Hill, Riverside and San Marco is close to a local custom given how much of the housing stock changes hands to people restoring it; an apology, where the flowers are the opening line and not the argument; a host gift for a Saturday dinner, which should arrive that morning rather than in your hands at the door; a thank-you to a nurse, a veterinarian's office, a hairdresser or the person who fixed something no one else could fix, all of which are front-desk deliveries where one arrangement is shared by a whole team; and the standing order for a parent or grandparent in Mandarin, Arlington, Ortega or Orange Park who would never ask for anything. None of these need a card that explains itself. The good ones name a specific thing: the week they had, the thing they did, the fact that you were thinking about them on a day with nothing attached to it.