Oregano and sage (S. offinalis) are both fine after flowering. In fact, I only ever harvest sage after blooming and often harvest oregano while in bloom.

Of note, sage has gorgeous blue flowers and the cloud of pink/purple blooms on oregano is quite pretty as well. These herbs are at home in the flower bed as well as the herb garden. Enjoy the blooms!

FataMorgana

thanks! so i can just leave all the bolted and non-bolted stalks alone?

You can harvest as you want but I would encourage you not to clip the sage flowers. They are just too pretty. But no clipping of either is required.

FataMorgana

Thank you so much for that info! :)

The term 'bolting' is usually reserved for annuals or biennial which have flowered and will thereafter die. For perennials like sage and oregano it isn't a problem. They are just flowering as is their nature and it won't affect their future growth. You can shear them over after the flowers fade to keep the bushes neat.