Growing Mint Outdoors: Container and In-Ground Guide

title: "Growing Mint Outdoors: Container and In-Ground Guide"

Fresh spearmint with lush textured green leaves and square stems close-up — Photo: Unsplash on Unsplash

By Thomas Joseph Published 2026-06-10 Updated 2026-06-13 Reviewed by Thomas Joseph 9 min read

I keep mint in a container. I have for years, and I have no regrets about that decision. Every season I see someone at the local garden swap talking about how their mint "got away from them" in the back bed — usually two to three years in, after it has established a root network that takes a full day to excavate. The containment advice is not overcautious. It is the first and most important thing to know about Mentha spp.

That said, contained mint is one of the most productive and useful herbs in a kitchen garden. A five-gallon pot in morning sun, kept cut back, provides more mint than most households can use.

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Quick Facts

Attribute	Detail
Scientific name	Mentha spp.
Plant type	Herbaceous perennial
USDA zones	3–9 (species-dependent; most common types zones 3–8)
Cold tolerance	Hardy to zone 3; dies back to ground in winter, re-emerges in spring
Light	Full sun to partial shade
Soil pH	6.0–7.0
Water	Moderate; prefers consistently moist soil
Containment	Required — plant in containers or with root barrier

Reader questions

Questions from other readers about this guide. Ask your own — if it's a good question, the answer goes here for the next reader.

Why should I grow mint in a container?

Per Penn State Extension, mint "spreads by underground rhizomes and can quickly take over a garden bed." A single plant established in-ground can spread 8–12 feet in a season. Containers stop this spread completely. The productivity and flavor of container mint is equal to in-ground mint -- the only difference is that you control its footprint.

Which mint species is best for cooking?

It depends on the application. Per Missouri Botanical Garden, spearmint (*M. spicata*) is "the most widely grown culinary mint" and the best choice for savory applications (lamb, salads, sauces). Peppermint (*M. x piperita*) has higher menthol content, making it better for tea, desserts, and mint-forward beverages. Both grow identically; the choice is flavor preference.

Will mint survive winter in a container outdoors?

In zone 7a, yes. Per Clemson HGIC, mint is hardy to zone 5 and can overwinter in a container outdoors in zone 7a as long as the root ball doesn't freeze solid. The top growth dies back after frost, but root systems survive in a 5-gallon or larger container through typical zone 7a winters. New growth re-emerges in March.

How often should I harvest mint?

Harvest every 2–3 weeks throughout the growing season, cutting to just above a leaf node. Per Clemson HGIC, "regular harvesting prevents woodiness and keeps plants producing new, tender growth." The plant responds to cutting by branching below the cut point, which increases the number of productive growing tips over the season. --- > Recommended gear: Best Insecticidal Soap: How Potassium Salts Kill Soft-Bodied Pests — our buyer's guide covering picks for every budget, ranked by Extension publication consensus and personal use.

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Growing Mint Outdoors: Container and In-Ground Guide

Quick Facts

Growing Mint Outdoors: Container and In-Ground Guide

Quick Facts

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