Korean mint/Agastache rugosa - any companion plant uses?

[elleme]

I had a self-seeded plant in my garden this year. At first I thought it might be Anise hyssop, which I'd tried a few years before and it died off. But this plant smelled different, like mint, although it didn't seem to be producing runners so I left it in situ. Eventually on a visit to Wisely I ID'd it as Korean mint/Agastache rugosa. It makes a decent herb tea, quite like mint but with a 'warm' aftertaste. So now that it has flowered and set seed I'll encourage it to self-sow more.

I was just wondering though, with its strong scent does it have any reputation as a companion plant?

[Ryez]

I read that mint is a companion plant for onions as it deters onion fly.

[elleme]

Belated thanks as I haven't posted for a few weeks - been busy, but not busy gardening! It's not really a mint, but as the smell's so similar I guess it could do the same job of confusing the onion fly. I may be giving up my allotment in November because I've found myself more pressed for time than I expected and next yearI is likely to be the same. So I may not grow onions, but I always find somewhere to fit some veg into my back garden so you never know.