Garden Scheme

Plant library  ·  Perennial Flowers

Catmint

Nepeta x faassenii

Catmint brings lavender-blue flower spikes and aromatic foliage to the front half of a sunny planting. At roughly 18 inches tall, it reads as a low, softening layer rather than a backdrop, while its long bloom window keeps the bed visually occupied from late spring into early fall. Use Nepeta x faassenii where a spreading perennial can knit together the edge of a border without blocking views across it.

  • Pollinator friendly
  • Deer resistant
Sunlight Full Sun
Water Low
USDA zones 3–8
Spacing 2 ft
Mature size 1.5 ft tall, 2.5 ft wide
Bloom Late spring - early fall

Placement and use

Set catmint along sunny paths, at the front of mixed borders, or in broad drifts beside patios and entrances. Its 2 1/2-foot spread can relax the hard line of paving, so keep the crown set back far enough that mature stems do not narrow the walking route. In a layered bed, place it ahead of taller perennials and shrubs, allowing its flower spikes to overlap the lower stems of neighbors rather than crowding their crowns. It also suits containers, rock-wall crevices, and dry-looking border sections with good drainage.[1][2]

Spacing and mature footprint

Plant on 2-foot centers for a connected edging or drift. Individual plants may spread about 2 1/2 feet wide, so this spacing intentionally allows the foliage to meet and create a continuous low layer. For a more distinct clump-by-clump effect, leave extra room between groups. Keep planting holes clear of path edges, stepping stones, and the bases of tighter-growing plants so the mature spread has somewhere to settle.

Three plants set 2 ft apart, center to center; shaded circles show the 2.5 ft mature spread.

Sun, water, and soil

Reserve a full-sun position with freely draining soil. Catmint's low water needs make it a sensible choice for a bed that is not kept consistently moist, but avoid sites where water collects around the crown after rain or irrigation. In hotter southern exposures, a little light afternoon shade can be useful while preserving the open, accessible placement needed for its spreading habit.[1][2]

Seasonal notes

The main display runs from late spring into early fall. After the first flush fades, shear back spent flower spikes to tidy the edge and encourage another round of bloom. Leave sufficient clearance in the plan for this midseason task, especially when catmint is used as a continuous path-side ribbon or planted beneath taller neighbors.[1][2]

Growing facts

Botanical name
Nepeta x faassenii
Type
Perennial
Category
Perennial Flowers
Lifecycle
perennial
USDA hardiness zones
3–8
Sunlight
Full Sun
Water
Low
Plant spacing
2 ft
Mature size
1.5 ft tall, 2.5 ft wide
Bloom season
Late spring - early fall
Pollinator friendly
Yes
Deer resistant
Yes
Native to North America
No

References

  1. Nepeta x faassenii (Blue Catmint, Faasen's Catmint) — North Carolina Extension Gardener Plant Toolbox
  2. Nepeta × faassenii - Plant Finder — Missouri Botanical Garden

Editorial content updated 2026-07-20.