Chives are also like that. I think I planted some in my parents garden when I was 12 about 25 years ago and it still keeps coming back every year. Often in different places as it roams around the garden, but I don’t think I’ve ever not had them come up somewhere.
That’s because it’s vv hardy, it’s rare for rosemary to drop seed like mint does though
Mint just fills the ground with seeds so it can show up forever whenever for whatever reason
Chives are also like that. I think I planted some in my parents garden when I was 12 about 25 years ago and it still keeps coming back every year. Often in different places as it roams around the garden, but I don’t think I’ve ever not had them come up somewhere.
I think they’re also a bulb plant like onions or garlic so they grow and spread underground.
Make underground babies that pop up elsewhere.
Like tulips