Lavandula × ginginsii 'Goodwin Creek Grey'

A shrub up to 90cm high, with evergreen, aromatic, linear, silvery sage-green-grey leaves which are 4-6cm long and may be entire, slightly toothed, or lobed, and flowering stems up to 30cm long topped by spikes 11-14cm long of fragrant, dark violet-blue flowers from midsummer; in mild climates it may flower at other times as well