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Nepeta subsessilis Blue Panther - Catnip

Nepeta subsessilis Blue Panther
Japanese Catmint

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More information

A variety of catmint that forms a dense, erect and branching bush, with broad, light green, aromatic leaves. This perennial flowers from the first year of planting with large spikes of wide pastel blue, fragrant flowers all summer. Nepeta subsessilis likes moisture and heavy soil. It is similar in its use to lavender, planted in the border, in flower beds or in pots, in the sun.  
Flower size
3 cm
Height at maturity
40 cm
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time June to September
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Description

Nepeta subsessilis Blue Panther is a bushy, upright and branched catmint, with broad light green, aromatic leaves forming a compact dome. This perennial blooms throughout simmer from the first year of planting with large spikes of wide pastel blue, fragrant flowers. Nepeta subsessilis prefers moisture and heavy soils. It is used in the same way as lavender, for edging, in borders and pots, in sunny locations.

Nepeta subsessilis belongs to the mint family. This perennial species is native to the moist mountain slopes of Asia. "Blue Panther" is a horticultural selection which rapidly spreads to form a dense and bushy clump 40 cm (16in) tall, with a spread of about 50 cm (20in). From June until September, it has pastel blue flowers, 3 cm (1in) long in dense spikes which are attractive to bees and butterflies. The medium green leaves are very aromatic when crushed. They are ovate, toothed and smooth, 8 to 10 cm (3 to 4in) long. It is one of the species most capable of withstanding high atmospheric humidity. Also known as catmint because its leaves are attractive to cats.

Nepeta subsessilis Blue Panther is easy to grow in moist, rich soil in a sunny position. It tolerates drier, poor, and rocky soils, but will flower less abundantly. It is not as drought-resistant as most Nepetas, but it tolerates heavy soils much better. Nepeta subsessilis can be used as an edging plant, in slopes or in pots. Pair it with roses in a romantic setting or with yellow or orange flowering perennials for example 'Terracotta' yarrow, Coreopsis or rudbeckias. for more contrast. It also pairs well with Lobelias and Turtleheads. Its pastel blue flowering will be enhanced by intense blues like that of Salvia guaranitica.

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Flowering

Flower colour blue
Flowering time June to September
Inflorescence Spike
Flower size 3 cm
Fragrance slightly scented
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Deciduous
Foliage colour medium green
Aromatic? Fragrant foliage when creased

Plant habit

Height at maturity 40 cm
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Nepeta

Species

subsessilis

Cultivar

Blue Panther

Family

Lamiaceae

Other common names

Japanese Catmint

Origin

Cultivar or hybrid

Product reference182241

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Planting and care

Nepeta subsessilis and its hybrids have a high tolerance to moist and clayey soils and a longer flowering period than lavender. If the clumps are carefully pruned they will bloom even more beautifully in autumn. It is easy to grow in any well-drained or clayey soil, not too dry in June and July. In very heavy soil, incorporate leaf compost or coarse sand at planting. Nepeta subsessilis prefers sunny locations but tolerates partial shade. It can tolerate short periods of drought.

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Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow
Type of use Border, Container, Slope
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Enriched with compost at planting.

Care

Pruning instructions Remove the faded flowers to encourage new flowers and fresh foliage.
Pruning Pruning recommended once a year
Pruning time July to August
Disease resistance Very good
Overwinter Can be left in the ground

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