Mint's persistence is impressive, isn't it? For future reference, lining the barrel with landscape fabric before planting can help prevent roots from escaping through drainage holes.
Mint really is something else. I had a similar experience a few years back—thought I'd outsmart it by planting in a vintage galvanized tub. Even lined it with landscape fabric, like you mentioned, but nope...it still managed to sneak out through a tiny rust hole I hadn't noticed. Now I've just accepted mint's determination as part of its charm and keep an eye on it. At least the bees seem happy!
Mint definitely has a mind of its own. Honestly, landscape fabric isn't always foolproof in my experience—roots can be sneaky and persistent enough to push through eventually. I've found better luck using double-layered plastic pots (with drainage holes) placed inside decorative containers. It keeps mint contained, and if it does escape, it's easier to manage. Plus, repotting is simpler when it inevitably outgrows the space...which it always does.
I've actually had decent luck planting mint directly in the ground, but only in a spot bordered by concrete paths. It spreads, sure, but the concrete seems to keep it mostly in check. Plus, it smells amazing when you brush past it...
Mint can be tricky, but sounds like you've nailed it with the concrete borders. I've seen it take over entire flower beds before, so your method seems pretty smart. If you ever want to expand your mint patch without risking a mint invasion, you could try sinking a large pot or bucket into the ground—keeps the roots contained but still gives you that natural look.
Also, totally agree about the scent when you brush past—it's such a nice touch for an outdoor space. I've been working on my own patio renovation lately, and adding herbs like mint and lavender near seating areas has made a huge difference. Nothing beats relaxing outside with a subtle fragrance drifting by. Sounds like you're on the right track with your cozy space...enjoy it!
Concrete borders definitely help, but have you thought about how the mint might affect nearby plants over time? I've seen mint roots sneak under barriers eventually—it's pretty persistent stuff. Curious if you've considered pairing it with other herbs or plants that can hold their own against mint's aggressive tendencies. Maybe something like rosemary or thyme could balance things out nicely...have you experimented with companion planting at all?
