Citrus aurantiifolia, commonly known as Key lime or Mexican lime, is a small, shrubby tree native to Southeast Asia. It is widely cultivated in subtropical and tropical regions for its small, green to yellow fruit, which is highly valued for its acidic juice. The plant belongs to the Rutaceae family and the Citrus genus. It thrives in warm climates and is sensitive to cold temperatures.
Key lime trees require bright, direct sunlight for optimal growth. They prefer moderate temperatures and high humidity. Water the plant regularly, allowing the soil to dry out partially between waterings. Ensure good air circulation to prevent fungal diseases. Fertilize the plant during the growing season to support healthy growth and fruit production.
Harvest
Citrus aurantiifolia, commonly known as key lime, should be harvested when the fruits are fully grown and have a slight yellow tint, indicating ripeness. This typically occurs about 5-6 months after flowering. To harvest, gently twist the fruit off the tree or use pruning shears to cut the stem, being careful not to damage the tree or the fruit. It is important to handle the fruits carefully to avoid bruising. Harvesting should be done regularly to encourage continuous fruit production.
Soil
Key lime trees prefer well-draining loamy soil with a slightly acidic pH. The soil should be rich in organic matter to provide the necessary nutrients. Good drainage is essential to prevent root rot, so consider using a soil mix designed for citrus plants.
Fertilizer
Use a balanced fertilizer with an N-P-K ratio of 6-6-6. Fertilize the plant every 6-8 weeks during the growing season. Reduce the frequency of fertilization during the dormant period. Ensure the fertilizer contains micronutrients like magnesium, iron, and zinc for optimal growth.
Repotting
Repot Key lime trees every 2-3 years or when the roots outgrow the current container. Choose a pot that is one size larger and has good drainage. Gently remove the plant from its old pot, trim any damaged roots, and place it in the new pot with fresh soil. Water thoroughly after repotting.
Propagation
Key lime trees can be propagated through seeds, cuttings, or grafting. The best time to propagate is during the spring or early summer. For cuttings, take a healthy branch, dip it in rooting hormone, and plant it in a well-draining soil mix. Keep the soil moist and provide bright, indirect light until roots develop.
Pruning
Prune Key lime trees to maintain their shape and remove any dead or diseased branches. The best time to prune is in late winter or early spring before new growth begins. Use clean, sharp tools to make clean cuts and avoid damaging the plant.
Toxicity
Key lime trees are not toxic to pets or humans. However, the fruit's juice can cause skin irritation in some individuals due to its high acidity. It is advisable to handle the fruit with care and wash hands thoroughly after contact.
Additional
Key lime trees can be grown indoors in containers, provided they receive adequate light and humidity. They are also suitable for outdoor cultivation in subtropical and tropical climates. Regularly check for pests like aphids, spider mites, and scale insects, and treat infestations promptly to prevent damage to the plant.
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