Fennel is traditionally used in perfumery and royal bouquets, so you could say these Haeckels’ incense cones have a monarch’s seal of approval. Defined by its sweet, aniseed-like scent, the botanical’s fragrance envelops your living space for up to four hours— depending on your room size— after one of these cones is lit. For safe burning, pair it with the brand’s burner or dish.