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A lovely, long-flowering, easy plant for those with light soils and a big garden, Nepeta Six Hills Giant is a large, vigorous, herbaceous perennial which makes a very good substitute for lavender in damper areas. It has small, aromatic, grey-green, elliptical leaves with toothed edges. From late May to July, and usually for longer, spires of lavender-blue, tubular flowers, very attractive to bumble bees, appear above the leaves. Clip over after the first flush of flowers to encourage fresh growth and flowering. Catmint Six Hills Giant is particularly good as an underplanting for old shrub roses or edging a large, sunny border, which will appear longer for the line of misty blues and greys.
Site: Tolerates exposure
Soil: Any light, very well-drained soil
Position: Full sun
Flowering period: Late spring and summer
Hardiness: Fully hardy
Height: 3 (90cm) Spread: 2 (60cm)
A reliable and generous perennial with soft grey-green foliage and abundant spikes of lavender-blue flowers from May to October. Reaching up to 65cm, it forms a graceful, airy mound thats ideal for hot, dry borders, wildlife friendly planting and Mediterranean style schemes.
Loved by pollinators, tough in drought, and low maintenance, this variety is arguably the best of the catmints for colour, scale, and staying power.
My opinion is that this common variety beats the rest hands down.