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Nepeta grandiflora

Caucasus Catmint · Beautiful Catmint · Large-flowered Catmint

Family LamiaceaeGenus Nepeta

A dense stand of soft crinkled leaves in opposite pairs, their edges finely toothed, filling the frame.
LeafAgnieszka Kwiecień, NovaCC BY-SA 4.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
perennialPlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
Purple, blueWikipedia
Native range
Baltic States, Central European Russia, North Caucasus, Northwest European Russia, Transcaucasus, UkraineGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • This catmint from the Caucasus has aromatic gray-green leaves and spikes of purple-blue flowers in early summer. Its cultivar 'Bramdean' holds the RHS Award of Garden Merit. Wikipedia: Nepeta grandiflora

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around April 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 31, 2024.

  1. Dry storage

    Duration: 1095 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 3 years from start to sowing. Then 5 days to germinate.

97% germination in 3–5 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nepeta p. 49Public domain
Show the original text
Nepeta (Lamiaceae). Seeds of N. sp DS 2 y and seeds of N. grandiflora DS 3 y germ. 70D(97% in 3-5 d) and 70L(85% in 3-5 d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nepeta p. 49. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around April 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 31, 2024.

  1. Dry storage

    Duration: 1095 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 3 years from start to sowing. Then 5 days to germinate.

85% germination in 3–5 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nepeta p. 49Public domain
Show the original text
Nepeta (Lamiaceae). Seeds of N. sp DS 2 y and seeds of N. grandiflora DS 3 y germ. 70D(97% in 3-5 d) and 70L(85% in 3-5 d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nepeta p. 49. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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