Lisbon lemon is a popular and widely cultivated variety of Citrus limon known for its classic tart flavor, high juice content, and bright yellow rind. Originating from Portugal, the Lisbon lemon tree is vigorous, thorny, and highly productive, often yielding fruit year-round, with peak harvests in winter and early spring. The fruit closely resembles the Eureka lemon in appearance and taste but is generally more cold-tolerant and slightly more acidic.