Quick Facts

• Mature size: Approx. 600–900mm high x 800–1000mm wide

• Position: Full sun

• Foliage: Aromatic, grey-green leaves

• Flowering: Late spring to early autumn

• Flower colour: Lavender-blue

• Climate tolerance: Heat, frost, and drought-tolerant

• Water needs: Low once established

• Maintenance: Low

Why You’ll Love it

Nepeta ‘Six Hills Giant’ is a vigorous and long-flowering perennial, renowned for its tall, arching stems covered in lavender-blue flowers that appear from late spring through early autumn. Its strong, upright form makes it ideal for adding height and structure to mixed borders, cottage gardens, and naturalistic plantings. The aromatic foliage and abundant blooms attract bees, butterflies, and other pollinators, making it both beautiful and wildlife-friendly. Tough, drought-tolerant, and low-maintenance, this Nepeta variety is perfect for creating a flowing, naturalistic effect in sunny garden spaces.

Planting & Care Tips

• Plant in full sun for best flowering and upright growth

• Prefers well-drained soil; tolerant of poor soils once established

• Water during establishment, then sparingly once established

• Deadhead lightly to encourage continuous flowering

• Cut back in late winter or early spring to maintain a tidy habit and stimulate fresh growth

• Pairs beautifully with ornamental grasses, Salvias, and other tall perennials for a naturalistic border