Light Needs
Mature Height
Mature Spread
Growing Zones
Tall stems laden with blue flowers gently sway in the breeze and provide stunning texture in addition to the lovely blooms. The Six Hills Giant Catmint provides reliable color from late spring through summer. Dense, gray-green foliage covers the lower portions of the stems and offers a lovely backdrop for the flowers.
Plant this catmint cultivar in a bed, border, or mass planting near a busy area so the fragrant flowers can be completely enjoyed. The tall, flowering stems can easily fill in the back of a bed, line a walkway, or conceal a foundation wall. This easy-care plant is both drought- and heat-tolerant. This plant is a perennial in USDA zones 4 through 8.
Six Hills Giant Catmint Care
The Six Hills Giant Catmint prefers full sun and moist soil to provide good drainage. Water this perennial plant weekly or when the top few inches of soil dry out. Catmint can handle dry conditions but continue to water during a dry spell for best results. Fertilize each spring to support new growth.
Cut the tall stems back by one-third if the stems become leggy. All growth can be trimmed back in the late fall or early spring.
Six Hills Giant Catmint Spacing
Six Hills Giant Catmint is a tall, mounded, upright plant that will grow 24 to 30 inches tall and spread 3 to 4 feet wide. Space plants 3 to 4 feet to create a dense bed.
Six Hills Giant Catmint Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 4 to 8 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Part Shade to Full Sun (3+ Hours Direct Sun)
- Mature Height
- 2 Feet
- Mature Spread
- 3-4 Feet
- Growth Rate
- Fast
- Growth Habit
- , Upright, Mounded, Spreading
- Water Needs
- Dry
Flowers & Foliage
- Flower Colors
- , Blue, Purple
- Flower Description
- Deep-blue lavender-blue
- Bloom Time
- Spring
- Harvest Time
- Late Spring through Summer
- Foliage Color
- , Green, Silver
- Foliage Description
- Green
- Foliage Type
- , Herbaceous
- Seasonal Interest
- , Spring Flowering, Summer Flowering, 3 Season Interest, Fall Interest
Garden Benefits
Plant Overview
- Common Name
- Six Hills Giant Catmint
- Botanical Name
- NEPETA 'SIX HILLS GIANT'
- Plant Type
- Perennial
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!