Garden flowers

Catmint

NepetaLamiaceae
Also: Nepeta
AT A GLANCE
Full sun Water: little H7below −20 °C 30–60 cm tall · 45–60 cm wide In a pot: yes
Flowering · UK
Flowering · Northern Italy
Flowering · Central Italy
Flowering · Southern Italy and islands

Protect young plants with twigs or mesh until established, since cats can flatten small plants before they get going.

Care

Light

Full sun.

Water

Drought-tolerant once established.

Soil

Free-draining soil of low to moderate fertility; dislikes rich, wet ground.

Pruning

Shear back hard after the first flowering flush in midsummer to encourage a second flush and prevent flopping; cut back to ground level in late winter/spring.

Feeding

No feeding. On lean, well-drained soil it makes a tight aromatic mound; on a rich one it grows twice the size, splits open in the middle and needs cutting back much sooner.

Propagation

Softwood cuttings in late spring root in a fortnight, or simply divide the clump as growth starts. Either way it is one of the easiest border plants to multiply.

Month by month

Months change with the climate: in southern Italy tomatoes go out two months earlier than in England.

  1. MarchCut back last year's growth before new shoots appear. how ›
  2. JuneKeep an eye out for cats flattening plants — a genuinely common genus-specific issue.
  3. JulyShear back hard after the first flowering flush for a second flush of flower. how ›

Months based on climate: UK. Your choice stays on this device.

  1. MarchCut back last year's growth before new shoots appear. how ›
  2. JuneKeep an eye out for cats flattening plants — a genuinely common genus-specific issue.
  3. JulyShear back hard after the first flowering flush for a second flush of flower. how ›

Months based on climate: Northern Italy. Your choice stays on this device.

  1. FebruaryCut back last year's growth before new shoots appear. how ›
  2. JuneKeep an eye out for cats flattening plants — a genuinely common genus-specific issue.
  3. JulyShear back hard after the first flowering flush for a second flush of flower. how ›

Months based on climate: Central Italy. Your choice stays on this device.

  1. FebruaryCut back last year's growth before new shoots appear. how ›
  2. JuneKeep an eye out for cats flattening plants — a genuinely common genus-specific issue.
  3. JulyShear back hard after the first flowering flush for a second flush of flower. how ›

Months based on climate: Southern Italy and islands. Your choice stays on this device.

Common problems

Powdery mildewfull sheet ›

How to spot it. In humid summers.

What to do. Improve airflow.

Flopping growth

How to spot it. In rich soil.

What to do. Move to leaner, sunnier ground, or shear back after first flush.

Cat damage

How to spot it. Physical flattening — cats are drawn to the foliage.

What to do. Protect young plants with twigs or mesh.

Popular varieties

Nepeta ‘Junior Walker’AGM40–50 cm × 60–75 cm · May–AugustMay–AugustApril–AugustApril–August
Nepeta ‘Purrsian Blue’35–45 cm × 60 cm · May–SeptemberMay–SeptemberApril–SeptemberApril–September
Nepeta ‘Six Hills Giant’AGM75–90 cm × 90 cm–1.2 m · May–SeptemberMay–SeptemberApril–SeptemberApril–September
Nepeta ‘Walker's Low’AGM60–75 cm × 75–90 cm · May–AugustMay–AugustApril–AugustApril–August

Questions

Catmint: is it hardy?

H7: Fully hardy anywhere in the UK. It survives below −20 °C.

Can it grow in a pot?

Standard container culture.

Catmint: when do you prune it?

Shear back hard after the first flowering flush in midsummer to encourage a second flush and prevent flopping; cut back to ground level in late winter/spring. In the calendar for UK, pruning falls in March, July.

Catmint: when does it flower?

In the climate of UK it flowers in May–September.

When do you feed it?

No feeding. On lean, well-drained soil it makes a tight aromatic mound; on a rich one it grows twice the size, splits open in the middle and needs cutting back much sooner.