Phenological changes to the chemical composition and biologicalactivity of the essential oil from Moroccan endemic thyme (Thymusmaroccanus Ball)

•Oil composition and biological activities of Thymus maroccanus at different growth stages were investigated.•Oils from different growth stages showed in general the same chemical profile.•Carvacrol is a predominant compound in T. maroccanus essential oils.•Oil from flowering and vegetative stages showed higher biological activities.•Flowering and vegetative stages are the optimal harvest times.