How to Grow Catmint Six Hills Giant
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Catmint Six Hills Giant
Nepeta × faassenii 'Six Hills Giant'
herbSix Hills Giant is a vigorous hybrid catmint cultivar prized for its impressive height and profuse lavender-blue flowers. A member of the mint family, it's a semi-evergreen perennial that attracts pollinators and deer-resistant garden borders. Known for its aromatic foliage and extended blooming season from late spring through fall.
When should you plant Catmint Six Hills Giant in your zone?
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Example Catmint Six Hills Giant timeline · Pittsburgh, PA (Zone 6b)
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Plant Catmint Six Hills Giant
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Catmint Six Hills Giant
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Catmint Six Hills Giant dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9, particularly excellent in zones 5-8
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Establishment
4-8 weeksYoung plants develop root systems and initial foliage; growth is relatively slow the first season
Water consistently during establishment phase; mulch lightly to retain moisture; avoid fertilizer which promotes weak growth; ensure excellent drainage
Vegetative Growth
Spring to early summer, 6-8 weeksBushy mounding form develops with aromatic gray-green foliage; plants reach 18-24 inches tall by mid-season
Pinch back stems in early spring to encourage bushiness; remove dead or woody stems; minimal fertilizer needed; tolerates dry conditions well
Flowering - First Flush
Late May to July, 6-8 weeksDense spikes of small lavender-blue tubular flowers emerge from leaf axils; flowers attract bees, butterflies, and hummingbirds
Deadhead spent flower spikes to encourage continuous blooming; increase water slightly during hot weather; this cultivar blooms prolifically once established
Summer Blooming
July to September, 8-12 weeksPlants continue producing flowers throughout summer; foliage remains aromatic and attractive even in heat
Deadhead regularly for extended blooms; reduce watering in cooler climates; in zones 8-9, provide afternoon shade and increase water to prevent stress
Fall Decline & Dormancy
October onwardFlowering tapers as temperatures drop; foliage persists but may turn bronze; plants enter semi-evergreen dormancy
Allow some dried seed heads to remain for winter interest and wildlife; cut back in late fall or early spring to 6-8 inches; no frost protection needed in zones 4+
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; increase humidity; use neem oil if severe; rarely problematic on established plants
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Yellow sticky traps; spray with insecticidal soap; usually not a significant issue
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Improve air circulation; avoid overhead watering; apply sulfur or fungicide if needed; 'Six Hills Giant' is generally resistant with good drainage
Uses
Herbal Tea & Beverages
CulinaryFresh or dried leaves brew into a mild, aromatic tea with a slightly sweet and minty flavor. Commonly used in herbal blends to soothe digestion and provide a calming beverage. [source]
Traditional Herbal Remedy
MedicinalCatmint has been used in folk medicine for centuries to support relaxation and calm nervous tension. The leaves contain volatile oils believed to have mild sedative and antispasmodic properties. [source]
Pollinator Magnet
WildlifeProfuse summer blooms attract bees, butterflies, hummingbirds, and beneficial insects. Excellent for supporting pollinators in ornamental and vegetable gardens. [source]
Fresh & Dried Floral Arrangements
HouseholdAttractive lavender-blue flower spikes and aromatic foliage work beautifully in fresh bouquets or dried arrangements. Dried catmint retains color and fragrance for several months. [source]
Fragrant Crafts & Sachets
CraftDried flowers and foliage can be used to create potpourri, sachets, and herbal crafts. The pleasant aroma persists long after drying. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest fresh foliage anytime during the growing season by pinching or cutting stems; best flavor before flowers fully open. Cut flowers individually for fresh arrangements or dry entire flower spikes by hanging upside down in a warm, dry location. Cut back the entire plant to 6-8 inches in late fall or early spring.
Fun Facts
- 🌱 Despite the common name 'catmint,' most catmint species have minimal appeal to cats compared to true catnip (Nepeta cataria); however, some individual cats are still attracted to it.
- 🌱 'Six Hills Giant' is a particularly vigorous cultivar that can reach 24-36 inches tall and wide at maturity, making it larger than standard Nepeta × faassenii selections.
- 🌱 Catmint has been cultivated in European gardens for over 500 years, traditionally valued for both medicinal properties and as an ornamental border plant.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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