Dark Blue Panther Catmint is a compact Japanese variety of Nepeta subsessilis that brings mesmerizing deep blue flowers and fragrant foliage into any garden space. Unlike sprawling catmints that dominate borders, this cultivar stays neatly contained at just 12 to 20 inches tall, making it equally comfortable in beds, borders, or containers. Hardy from zones 4 through 9, it blooms reliably in its first year and will return season after season as a perennial workhorse. The flowers are notably larger than other catmint types, and their rich fragrance draws pollinators throughout the growing season.
12
Full Sun
Moderate
4-9
20in H x ?in W
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Moderate
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The oversized blue blooms stand out immediately among catmint varieties, paired with a fragrance that gardeners specifically praise. Its compact, tidy mounding habit means it won't sprawl across your garden uninvited, staying dense and bushy without constant pruning. Best of all, it flowers the first year from seed while simultaneously establishing as a long-lived perennial, giving you immediate color while building garden structure that lasts for years.
Catmint serves primarily as an ornamental herb in borders, containers, and rock gardens. Its fragrant foliage and prolific blue blooms make it valued for pollinator gardens, where it reliably feeds bees, butterflies, and other beneficial insects throughout the season. Though technically herbaceous and aromatic, it's grown more for its garden performance and aesthetic presence than for culinary or medicinal harvest.
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Start seeds indoors 6 to 8 weeks before your last spring frost date. Maintain soil temperatures between 60 and 75 degrees Fahrenheit for consistent germination. Sow seeds on the soil surface or just barely covered, as light aids germination. Once seedlings have developed true leaves and nighttime temperatures stay above 50 degrees, harden them off by gradually exposing them to outdoor conditions over 7 to 10 days before transplanting.
Transplant hardened seedlings outdoors after the danger of spring frost has passed and soil temperatures remain consistently above 50 degrees Fahrenheit. Space plants 12 inches apart in full sun. Gently firm soil around the root ball and water in thoroughly to settle soil and reduce transplant shock.
Direct sow seeds outdoors after spring frost danger has passed and soil is workable. Sow seeds on the soil surface or barely covered; light improves germination. Thin seedlings to 12 inches apart once they develop true leaves.
Deadhead spent flower spikes regularly to encourage continuous blooming throughout the season. In early spring, cut back the previous year's dried stems to just above the new growth emerging from the base; this maintains the plant's compact, tidy mounding habit. Light shearing after the first flush of bloom can stimulate a second round of flowers and refresh the plant's appearance.
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“This Japanese catmint carries the botanical name Nepeta subsessilis, reflecting its origins in East Asian horticulture. It arrived in Western gardens as gardeners sought more refined, compact alternatives to aggressive spreading varieties. Baker Creek Heirloom Seeds selected and preserved this cultivar specifically for its superior bloom size and fragrance, recognizing that Japanese gardening traditions had already perfected what Western gardeners were still learning to appreciate: the value of restrained elegance in a perennial.”