I planted some grapefruit mint I think was the variety. It had soft lavender colored flowers on it. I know that mint spreads crazy by roots, but I figure I can keep it chopped out. But it later occurred to me that it may make seed that could come up all over the place? If that's the case, I may have to dig it up and put it in a pot more contained at cut off the blooms before they mature to seed.

I have planted mind in large pots (24" or so across and 12-15" deep) with the bottoms cut out. I figured I could control its tendency to spread madly here. The roots turn woody and thicken so much that I don't trust being able to control it any other way. No flowers to be seen in the last two years though. Which is good.

Mint is extremely invasive and tough to control once it gets away from you. You'll have to dig up every single bit of the underground rhizomes/runners. Yes, mint does flower.

I know it flowers, but are they sterile or will they sprout? Keeping the runners out isn't going to be too big of a deal for me, but if there are seeds sprouting that may be a deal killer. I thought about replacing it with something else.

I used to grow mint in my flower beds, but quit that years ago. Now all the mint are in pots. That solved my problem.

I believe the flowers are sterile.

well I am interested in the flowers, it flowered for a long time last summer and was a soft blue purple color which looked nice with my pink knockout roses. I am hoping the mint will help keep the bugs away from the roses too. But then I thought if the flowers make viable seed, I would need to cut them before they dropped or take it out altogether. I do hope they are sterile.

I have never heard of anyone being overrun from self seeding mint, only from the runners.

Thanks!