Calamondin (Citrus × Citrofortunella microcarpa)

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Common Names: Calamondin, Calamansi, Philippine Lime, Panama Orange
Family: Rutaceae
Origin: Southeast Asia (particularly the Philippines)

The Calamondin (Citrus × Citrofortunella microcarpa) is a unique and versatile citrus hybrid, cherished for its small, tangy fruits and ornamental beauty. A cross between a kumquat and a mandarin orange, this compact citrus tree is a favorite in both culinary and ornamental gardens. Known as Calamansi in the Philippines, where it is widely used in cooking, this plant is ideal for container gardening and makes a stunning addition to patios, gardens, or even indoor spaces.

Distinctive Features and Uses

Leaves: The Calamondin tree has glossy, dark green leaves that are dense and evergreen, providing year-round beauty. The foliage has a slightly aromatic quality, adding a fragrant touch to your garden or home.

Fruits: The small, round fruits of the Calamondin are about the size of a large marble, with a thin, smooth skin that turns bright orange when fully ripe. The flesh is juicy and highly acidic, with a flavor similar to a tart lime. The fruit is packed with seeds and is commonly used in cooking, as a garnish, or for making refreshing drinks and preserves. The entire fruit, including the skin, can be used, adding a tangy zest to dishes.

Uses: Calamondin fruits are extremely versatile in the kitchen. They are widely used in Southeast Asian cuisine, particularly in Filipino dishes, as a souring agent or flavor enhancer. The juice is perfect for marinades, salad dressings, sauces, and refreshing beverages. The fruit can also be candied, made into marmalades, or used as a garnish for desserts and cocktails. Additionally, the tree’s compact size and year-round beauty make it a popular ornamental plant for both indoor and outdoor spaces.

Quick Care Guide

Plant Type Perennial Fruit Tree
Harvest Season Year-round (with peak seasons in winter and summer)
Mature Size 6-10 feet tall, 4-8 feet wide (smaller in containers)
Soil & Moisture Well-draining, sandy loam soil; moderate moisture with good drainage
Light Requirements Full Sun
Growth Rate Moderate
Self-fertile Yes
Zone Hardiness Outdoors 8-11 depending on variety; Patio/Greenhouse 4+
Propagation Grafted and capable of producing fruit this growing season or in up to 2-3 years. 

Full Growing Guide

Climate and Soil Requirements

  • Climate: Calamondin thrives in warm, temperate to subtropical climates and is best suited for USDA hardiness zones 8-11. The tree prefers temperatures between 70-90°F and can tolerate brief periods of cold, but it should be protected from frost. In cooler climates, it can be grown in containers and brought indoors during the winter.
  • Soil: Prefers well-draining, sandy loam soil with a slightly acidic to neutral pH (6.0-7.0). The tree benefits from soil enriched with organic matter, such as compost, but excellent drainage is crucial to prevent root rot.

Planting

  1. Location: Choose a sunny location that receives at least 6-8 hours of direct sunlight daily. Calamondin performs best in full sun, which is essential for vigorous growth and fruit production.
  2. Soil Preparation: Prepare the soil by tilling and adding compost or organic matter to enhance fertility and drainage.
  3. Planting Time: Plant in the spring after the last frost, when the soil has warmed up. In Florida, planting in the summer is also a great option due to the abundance of rain, which helps establish young trees with consistent moisture. If planting in containers, ensure the pot is large enough to accommodate the tree’s growth and has adequate drainage.
  4. Spacing: Space trees 4-8 feet apart if planting in the ground, or keep potted plants spaced for good air circulation.

Watering

  • Consistent Moisture: Water regularly to keep the soil consistently moist but not waterlogged. Calamondin requires moderate watering, especially during dry spells, but should not be overwatered.
  • Mulching: Apply a thick layer of mulch around the base to retain moisture, suppress weeds, and regulate soil temperature.

Sunlight

  • Full Sun: Ensure the tree receives at least 6-8 hours of direct sunlight daily for optimal growth and fruit production. In areas with hot summers, some afternoon shade can help prevent leaf scorching.

Fertilizing

  • Growing Season: Apply a balanced, slow-release fertilizer in early spring to promote healthy growth and abundant fruiting. Supplement with a citrus-specific fertilizer during the growing season to support fruit development.
  • Frequency: Fertilize every 6-8 weeks during the growing season for optimal growth.

Pruning and Maintenance

  • Routine Pruning: Prune the tree in late winter or early spring to remove dead or damaged branches and to shape the tree. Regular pruning helps to maintain a manageable size and promotes better air circulation and light penetration.
  • Maintenance: Calamondin is relatively low-maintenance once established. Keep the area around the tree clear of weeds and debris to prevent pests and diseases.

Pest and Disease Management

  • Common Pests: Monitor for pests such as aphids, scale, and citrus leafminers. Use insecticidal soap or neem oil to control infestations.
  • Diseases: Calamondin is relatively resistant to many citrus diseases, but it's still important to watch for signs of citrus canker, anthracnose, and root rot. Ensure proper spacing, good air circulation, and avoid overhead watering to reduce disease risk.

Harvesting Fruit

  • When to Harvest: Calamondin fruits can be harvested year-round, with peak seasons in winter and summer. The fruit is ready to pick when it turns bright orange and is slightly soft to the touch. The entire fruit is edible, including the peel.
  • How to Harvest: Gently twist or cut the fruit from the tree, leaving a small portion of the stem attached. Enjoy the fruits fresh, as juice, in culinary dishes, or preserved.

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            Planting Location and Soil Preparation

            Choose a sunny location for your citrus tree that receives at least 8 hours of direct sunlight daily. Well-draining soil is essential to prevent waterlogged roots. If your soil is heavy or clay-like, consider amending it with compost to improve drainage.  Citrus trees a particularly high demand for nitrogen.

            Planting Your Citrus Tree

            Plant your citrus tree any time of the year. Follow these steps:

            • Dig a hole that is twice the width of the root ball and just as deep.
            • Gently remove the tree from its container and loosen the roots.
            • Place the tree in the hole at the same depth it was in the container and backfill with soil.
            • Water thoroughly to settle the soil and eliminate air pockets.

            Watering

            Proper watering is vital for healthy citrus trees. Water deeply and infrequently to encourage deep root growth. During the growing season, water every 1-2 weeks, allowing the top few inches of soil to dry out between waterings. Reduce watering frequency during winter.

            Fertilizing

            Citrus trees have specific nutritional needs and a particularly high demand for nitrogen. Feed your tree with a balanced citrus fertilizer or a granular fertilizer with an N-P-K ratio of 2:1:1. Apply fertilizer every 6-8 weeks from spring to early fall, reducing or stopping during winter.

            Pruning

            Regular pruning maintains the shape, health, and fruit production of your citrus tree. Prune to:

            • Remove dead or diseased branches.
            • Thin out overcrowded growth.
            • Open the canopy to sunlight and air circulation.
            • Shape the tree for better aesthetics and easier harvesting.

            Pest and Disease Management

            Keep a close eye on your citrus trees for signs of pests or diseases. Common pests include aphids, scales, and mites. Monitor for citrus-specific diseases like citrus canker and huanglongbing (citrus greening). Use organic pest control methods whenever possible.

            Frost Protection

            If you live in an area prone to frost, take precautions to protect your citrus trees until they are well-established. Cover them with frost cloth or blankets when frost is expected, and consider moving potted citrus indoors during colder months.

            Mulching

            Apply a layer of organic mulch around the base of your citrus tree to retain moisture, suppress weeds, and improve soil health. Keep the mulch away from the trunk to prevent rot.

            Harvesting Citrus Fruits

            Harvest your citrus fruits when they are fully ripe. Different varieties have varying ripening times, usually ranging from several months to a year. Fruits should be firm, fully colored, and easy to detach from the tree. Use pruning shears or a sharp knife to cut the fruit, leaving a small stem attached.

            By following this comprehensive growing guide, you'll be well-equipped to nurture healthy and fruitful citrus trees that provide you with a continuous supply of delectable and nutritious citrus delights.

            Happy citrus tree growing!

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            Why We Dig It

            Sweet, tangy, juicy citrus fruit is more than just a delicious snack or an essential ingredient in your Sunday afternoon mimosas!

            Citrus fruit are an amazing source of Vitamin C, an essential vitamin that helps prevent and treat the common cold/upper respiratory infections and improve heart health. Your body can’t make vitamin C on its own so you need to get it from fruits like citrus, fresh vegetables, berries, etc.

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