I checked my list of edible flowers and I don't see 4 Oclocks on the list.

I would not chance eating four-o-clocks. There may be a good reason that they are so pest-resistant and carefree. I would settle for fragrance, color and attracting hummingbirds and big moths.

Ha and they make great mulch producing plants too. I whack and pull and rip at 'em and back they always come ;o)
Mike

Don't EAT them. These are a known poisonous plant. If you want something pretty and tasty, eat the nasturtiums!

Do not ever, EVER ingest any plant that you haven't had identified by a realiable expert source as 100% SAFE. Period.