HS Tariff code as 3301.29. CFIA regulated, for most countries of origin CFIA approved; duty free.Essential oils (terpeneless or not), including concretes and absolutes; resinoids; extracted oleoresins; concentrates of essential oils in fats, in fixed oils, in waxes or the like, obtained by enfleurage or maceration; terpenic by-products of the deterpenation of essential oils; aqueous distillates and aqueous solutions of essential oils.
3301.24.00.00 -Of peppermint (Mentha piperita); duty is 3%; 3301.25.00.- Of spear mint: duty free.
ARGO Canadian Customs Brokers can check the rate of duty (depends on the Country of Origin and Country of direct shipping) for you. Or you can use our on-line duty & TAX calculator:
https://www.argocustoms.com/import-duty-tax-calculator.php