What hardiness zones is Calamintha nepeta ssp. nepeta suitable for?

Calamintha nepeta subsp. nepeta is an herbaceous perennial reaching 12-18 inches (30-45 cm) tall with a spread of 18-24 inches (45-60 cm) and a bushy, mounding, spreading habit. Native to southern Europe and the Mediterranean, it produces small, rounded, grey-green, aromatic leaves 0.5-1 inch (1-2.5 cm) long on wiry, branching stems with a mint-like fragrance when brushed. Clouds of tiny, tubular, white to pale lilac flowers 0.25 inch (6 mm) long bloom profusely from midsummer through hard frost—creating an airy, hazy effect. Among the longest-blooming perennials. Hardy to zone 5. Growth rate is moderate. Self-seeds readily in well-drained soil. Short-lived (3-4 years) but self-replacement maintains colonies.

Native Range

Calamintha nepeta subsp. nepeta is native to southern Europe, the Mediterranean basin, and western Asia.

Suggested Uses

Grown in perennial borders, rock gardens, gravel gardens, cottage gardens, herb gardens, and along pathways (fragrance when brushed). Pollinator magnet—bees. Longest continuous bloom (14-16 weeks). Airy cloud-like effect. Mint-scented foliage. Drought-tolerant. Deer-resistant. Herbal tea. Edging. Not suitable for wet soils (crown rot). Self-seeds freely—can spread beyond bounds. Short-lived 3-4 years.

How to Identify

Distinguished from Agastache (hyssop) by the much smaller flowers (0.25 versus 0.5-1 inch), the airy cloud-like (versus dense bottlebrush) inflorescence, and the lower mounding (versus tall upright) habit. Distinguished from catmint (Nepeta) by the smaller leaves, the more compact mounding habit, and the tiny tubular (versus larger lipped) flowers. Calamint—tiny white-lilac cloud, airy hazy, mint-scented, longest bloom (midsummer-hard frost), low mounding, self-seeding, wiry.

Appearance

Size & Dimensions

Height1' - 1'6"

Width/Spread1'6" - 2'

Reaches mature size in approximately 2 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~16 weeks

Summer Fall

Clouds of tiny white to pale lilac tubular flowers from midsummer through hard frost—one of the longest continuous bloom periods of any perennial (often 14-16 weeks). Flowers produced in profuse loose clusters along the stems. Pollinator magnet—especially bees. Self-seeds freely.

Detailed Descriptions

Flower Description

White to pale lilac; tiny tubular 0.25 inch; profuse airy clouds; midsummer-frost

Foliage Description

Grey-green; small rounded aromatic 0.5-1 inch; on wiry branching stems; mint-scented

Growing Conditions

Sun Requirements

Full Sun

Requires 6-10 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.5 - 7.5(Neutral)

357912

Soil Types

loam sand chalk

Drainagewell drained

Water & Climate

Water Needs

Low

Frost Tolerance

hardy

Time to Maturity

Flowers first year from transplant; full size second year

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Plant in spring. Full sun, lean to moderate, well-drained soil (pH 6.5-7.5). Excellent drainage critical—crown rot in wet winter soil. Drought-tolerant once established. Hardy z5. Cut back to 2-3 inches in early spring when new growth appears at base. Self-seeds readily—deadhead to control spread, or allow naturalization. Short-lived 3-4 years but self-replacement maintains plantings.

Pruning

Cut back to 2-3 inches (5-8 cm) in early spring. Shear lightly mid-season if plants become floppy to promote fresh flush. Deadhead to prevent self-seeding if spread is not desired.

Pruning Schedule

early spring

Maintenance Level

low

Container Growing

✓ Suitable for container growing

Minimum container size: 2 gallons

⚠️ Toxicity Warning

Non-toxic