Caucasus catmint (Nepeta grandiflora)

Also known as: Large-flowered catmint, Caucasian catnip

N. grandiflora and its cultivars are popular choices for ornamental gardening, especially suited for sunny spots in the middle of flower borders. The cultivar ‘Bramdean’ has been honored with the Royal Horticultural Society’s Award of Garden Merit.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Caucasus catmint

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

75 cm

Spread

60 cm

Leaf Color

Green Gray Silver

Flower Size

1 inch (2.5 cm)

Flower Color

Blue Purple

Images of Caucasus catmint

Quickly Identify Caucasus catmint

Nepeta grandiflora can be identified by its upright growth habit, toothed green leaves that are aromatic when crushed, and dense spikes of two-lipped blue or violet flowers.

Scientific Classification of Caucasus catmint

Phylum

Vascular plants

Class

Dicotyledons

Order

Lamiales

Family

Mint

Genus

Catnips

Species

Caucasus catmint

Planting and Growing of Caucasus catmint

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Caucasus catmint?

The watering amount for Nepeta grandiflora should ideally be about 500 milliliters per session. It’s important to maintain the soil moisture without creating standing water. This plant prefers well-drained soil, so ensure you water until you see moisture emerging from the drainage holes.

What are the symptoms of an underwatered Caucasus catmint? ›

What should I do if my Caucasus catmint is not getting enough water? ›

What are the symptoms of an overwatered Caucasus catmint? ›

How to save an overwatered Caucasus catmint? ›

What Are the Sunlight Requirements for Caucasus catmint?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Nepeta grandiflora flourishes in full sun to partial sun environments. Ideal light encourages dense growth, vibrant flowers, and improved plant health.

How much sun does Nepeta grandiflora need? ›

What happens if it doesn't get enough sun? ›

What are the benefits of sufficient sun exposure? ›

What Is the Ideal Temperature Range for Caucasus catmint?

Ideal Temperature: 60 ~ 75℉

Nepeta grandiflora thrives best in temperatures ranging from 60°F to 75°F. This range provides the plant with the necessary warmth for photosynthesis while avoiding the risk of thermal stress, thus promoting healthy growth.

What Soil is Best for Caucasus catmint?

Soil type: Sandy loam, Loam

Soil PH: 6.5 ~ 7.5

Nepeta grandiflora thrives in soil that provides excellent drainage. This ensures that water does not stagnate, which can lead to root rot. Properly draining soil helps maintain root health and fosters a robust growth environment for the plant. While Nepeta grandiflora is not a heavy feeder, it benefits from soil with moderate nutrients. This balance helps the plant grow vibrant foliage and plentiful flowers without the risk of excessive fertilization that can harm its health and structure. With a suitable pH level between 6.5 and 7.5, this range allows for optimal nutrient uptake for Nepeta grandiflora. It ensures that essential minerals are available and not locked in the soil, promoting lush growth and strong flowering.

How to Fertilize Caucasus catmint?

Fertilizer type: Balanced

For Nepeta grandiflora, it's essential to balance fertilization without overwhelming the plant. Apply a moderate amount of fertilizer, approximately half the recommended dose on the package for sensitive plants. Start with about 1 tablespoon for solid fertilizers and adjust based on plant response.

How to Prune Caucasus catmint?

Pruning Time: Spring, Summer

Start by deadheading, which involves cutting off spent flowers to encourage further blooming. Follow the stem down to the first or second set of leaves, and snip the flower stem just above to stimulate new growth. Trim the plant back to maintain your desired shape, paying special attention to straggly or overgrown stems. Aim to open up the center of the plant to allow for better air circulation and light penetration. More About Pruning Techniques→

How to Propagate Caucasus catmint plant?

Propagate Time: Spring, Early Spring, Late Spring

Begin by filling your seed tray with a lightweight potting mix. Sow the Nepeta grandiflora seeds evenly across the surface and lightly cover with soil. Ensure the soil is moist but not waterlogged, and keep the tray in a warm spot with indirect sunlight.

Select a healthy part of the plant and cut a 4-6 inch segment just below a node. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cutting in a pot with moistened potting mix, ensuring the node is beneath the soil surface.

Dig up the mature Nepeta grandiflora plant carefully, disturbing the root system as little as possible. Gently pull apart the clumps by hand or use a sharp knife to divide the roots. Replant the divisions promptly at the same depth they were growing previously.

More About Propagating Techniques→

How to Repot Caucasus catmint plant?

Repotting frequency: Every 2-3 years

The best time to repot Nepeta grandiflora is when you notice its roots growing through the drainage holes or when its growth slows down, suggesting the plant is root-bound. Repotting in spring or autumn leverages the plant’s active growth periods, helping it recover quickly.

Select a pot that is just a couple of inches larger in diameter than the current one. This allows roots room to grow without causing excess soil to retain moisture, reducing the risk of root rot. Ensure the pot has sufficient drainage holes for excess water to escape.

Opt for a well-draining potting mix that contains ingredients like perlite or sand. This prevents waterlogging and allows air circulation around the roots, promoting healthy growth and reducing the risks of root diseases.