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A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials.
A Salvia divinorum plant. Salvia (Sage) is a common perennial herb that grows throughout the world. The plant grows to be several feet tall and has large light-green leaves. Salvia is a member of the mint family, and is considered a common garden plant.Most common forms of Salvia can be found in plant nurseries.alvia (Sage) is a common perennial herb that grows throughout the world. The plant grows to be several feet tall and has large light-green leaves.