It's good idea to consider whether you are growing herbs just as companion plants, for cooking or both. There are some perennial herbs which grow well here in the UK, some herbs can be planted in flower beds and most people wouldn't know they were herbs, and there are others which need to be sown annually.
I grow basil along side toms as it's supposed to improve the taste and grow coriander which is allowed to bolt purely because I like the smell when you brush past it but also use it in curries and the seeds store well. Chives are good in lots of dishes and produce nice lilac flowers.
Bookwormy. It would help to know which herbs you want to grow...which flowers do you want to grow and are you growing veg...