Yes — basil is aromatic, completely safe, and a fun sensory experience for parrots.
Keeper's noteOffer a whole sprig and watch them shred it. A pot of live basil on the play stand is enrichment that regrows itself.
Why basil is good for parrots
Fresh basil is non-toxic, mildly antioxidant, and engaging in the way parrots love: fragrant, shreddable, and novel. All common varieties — sweet, Thai, purple — are equally safe.