Lavandula intermedia ( Grosso Lavender )
This is the classic lavender used in sachet , perfume , wand , etc . Rounded habit and oblong to spear shape , leaf is redolent and grey - viridity and flowers are abstruse , dingy violet , appear in July and August . Thrives in full Dominicus and loose , well - drain soil . Little to no fertilization best . To keep plants compact , rationalize soon after flowering ....