Does Lemon Balm Spread Like Mint? Key Facts

By James Wilson · January 23, 2026

Does Lemon Balm Spread Like Mint?

Yes, lemon balm (Melissa officinalis) can spread vigorously in the garden, though typically less aggressively than mint (Mentha species). While both plants propagate through underground runners (rhizomes) and self-seeding, lemon balm spreads at a more moderate pace, making it easier to manage with proper planning.

Understanding Lemon Balm Growth Habits

Lemon balm is a perennial herb in the Lamiaceae (mint) family, which explains its shared traits with mint, such as square stems, opposite leaves, and aromatic foliage. However, growth intensity varies significantly between the two.

Key Factors That Influence Lemon Balm's Spread

Rhizomatous growth: Lemon balm spreads via shallow rhizomes that extend outward from the parent plant.
Self-seeding: In favorable climates, it readily drops seeds, leading to new plants in nearby areas.
Climate and soil: Grows most aggressively in moist, rich soils and temperate zones (USDA zones 4–9).
Pruning habits: Regular trimming reduces seed formation and controls size.

Comparing Lemon Balm and Mint: Invasion Potential

Although related, lemon balm is generally considered less invasive than common mint varieties like spearmint or peppermint. The following table compares key growth characteristics.

Characteristic	Lemon Balm	Peppermint	Spearmint
Spread Mechanism	Rhizomes + self-seeding	Aggressive rhizomes	Very aggressive rhizomes
Average Spread per Year (inches)	12–24	24–48	36–60
Invasiveness Rating (1–5)	3	5	5
Height (inches)	12–24	24–36	18–36
Recommended Containment	Potted or root barrier	Strong root barrier required	Strong root barrier required

Table data source:1, 2, 3

The data shows that while lemon balm does spread, its annual expansion is roughly half that of peppermint and significantly less than spearmint. With a moderate invasiveness rating of 3 out of 5, it requires attention but not the extreme containment measures often needed for true mints.

How to Control Lemon Balm in the Garden

Preventing unwanted spread is simple with proactive management techniques.

Effective Containment Strategies

Grow in containers: Potted lemon balm eliminates rhizome spread into garden beds.
Install root barriers: Use metal or plastic edging sunk 10–12 inches deep around planting areas.
Deadhead flowers: Remove blooms before they set seed to prevent volunteer seedlings.
Divide regularly: Split plants every 2–3 years to maintain vigor and limit overcrowding.

Benefits of Growing Lemon Balm Despite Its Spread

Despite its tendency to spread, lemon balm offers numerous benefits that make it a valuable garden addition when managed properly.

Natural pollinator attractant (bees, butterflies)
Culinary uses: teas, salads, desserts
Medicinal properties: studied for calming effects and antioxidant content
Pleasant citrus scent deters mosquitoes and aphids

Frequently Asked Questions About Lemon Balm and Its Spread

Is lemon balm as invasive as mint?

No, lemon balm is less invasive than most mint species. While both spread via rhizomes, mint expands faster and deeper, often overtaking gardens. Lemon balm spreads moderately and is easier to control with basic gardening practices.

Can I plant lemon balm directly in the ground?

Yes, but it’s best planted with a root barrier or in a contained bed. Without restrictions, it may gradually encroach on neighboring plants, especially in fertile, moist soil.

Does lemon balm come back every year?

Yes, lemon balm is a hardy perennial in USDA zones 4–9. It dies back in winter and re-emerges in spring from rootstock or self-sown seeds.

How fast does lemon balm take to spread?

Under ideal conditions, lemon balm can spread 12–24 inches per year. Growth peaks in spring and early summer, slowing during hot, dry periods.

What kills lemon balm permanently?

To eliminate lemon balm completely, remove all root fragments manually or apply glyphosate-based herbicides carefully. Repeated digging over several weeks may be needed, as missed rhizomes can regrow.