Nepeta grandiflora
This species catmint makes an upright clump with larger flowers than many other catmints. It blooms in early summer with light purple blue spikes and can repeat if deadheaded. It prefers full sun and free draining soils. Plants are aromatic and attract pollinators and are deer resistant.
At‑a‑glance
- Group/Class: species catmint
- Height × spread: 24 to 30 in × 20 to 40 in (60 to 75 cm × 50 to 100 cm)
- Bloom window: June to July; repeats with deadheading
- Color & flower form: light purple blue flower spikes with larger florets
- Fragrance: 2 noticeable
- USDA hardiness: unknown / varies by climate
- Breeder / Year / Origin: unknown, Caucasus
- Pet safety: sources differ; see References
How it differs
- Larger individual flowers than many catmints.
- Upright stems with a looser, open habit.
- Main bloom is early summer rather than late spring.
- Best performance where summers are not excessively humid.
Strengths
- Showy flower size for mid border placements.
- Good pollinator support.
- Responds to deadheading with repeat bloom.
Care in one minute
- Grow in full sun with well drained soil.
- Water to establish; then water deeply but infrequently.
- Deadhead after the first wave to encourage repeat bloom.
- Cut back low in late fall or very early spring to renew growth.
Watch‑outs
- Can open up or relax on rich soils.
- Repeat bloom depends on timely deadheading.
- Avoid poorly drained sites.
Best uses (tags)
borders; pollinators; massing; cottage gardens
Provenance note
A Caucasus species selected for gardens for its larger flowers and upright habit.
Written by: Your Flowers Guide editorial team
We are a small independent group of flower lovers who research and review each guide using trusted horticultural and educational sources. Learn more about us