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Sunlight: Lemon trees need at least 6–8 hours of direct sunlight daily. If you're growing a lemon tree indoors, place it near a south-facing window. Soil: Lemon trees grow best in well-drained, medium-textured, and moderately deep soils with a pH between 5.5 and 7.5. Avoid low-lying areas prone to standing water. Watering: Water your lemon tree deeply and infrequently to encourage healthy root development and prevent root rot. Let the top inch of soil dry out slightly between waterings. Pruning: Pruning improves air circulation, encourages sunlight exposure, and maintains a healthy shape. Temperature: Lemon trees grow best at daytime temperatures from 77°F to 86°F (25°C to 30°C) and nighttime temperatures from 55°F to 65°F (13°C to 18°C).Temperatures below 25°F (-4°C) can harm immature plants.