Lavandula × christiana

A tender, woody-based perennial or shrub up to about 0.8-1m high, with an erect and speading habit, evergreen, aromatic, deeply lobed grey-green leaves, the lobes also divided, and branched flowering stems 30-60cm long topped by splender spikes 4-10cm long of large, fragrant, lavender-violet flowers with darker violet-blue calyces in summer; it may also flower almost year round