Caimito Chrysophyllum cainito

About Caimito

Caimito, scientifically known as Chrysophyllum cainito, is a tropical evergreen tree belonging to the family Sapotaceae. Known internationally as Star Apple and locally as kaimito or milk fruit, it is one of the most cherished seasonal fruit trees in Philippine backyards. The tree is valued both for its sweet, creamy fruit and its exceptional qualities as an ornamental shade tree, with glossy dark green leaves that flash golden-bronze on their undersides when the wind blows — a signature visual feature that makes caimito instantly recognizable in the Filipino landscape.

A mature caimito tree reaches impressive heights of 10 to 20 meters with a dense, rounded canopy that provides deep shade over a wide area. The leaves are elliptical, leathery, and distinctly two-toned: dark glossy green on the upper surface and a beautiful satiny golden-bronze underneath. This bicolored foliage creates a shimmering effect in the breeze that has made caimito a favorite ornamental tree even among those who never harvest the fruit. The bark is grey-brown and rough, and the entire tree contains a milky white latex that is characteristic of the Sapotaceae family.

The fruit itself is what draws most attention. Round, about the size of an apple (5 to 10 cm in diameter), caimito fruit comes in two main varieties in the Philippines: the deep purple type and the greenish-yellow type. When cut crosswise, the fruit reveals a stunning star-shaped pattern formed by the seed chambers radiating from the center — this is the origin of the English name "Star Apple." The flesh is soft, creamy, and milky-sweet, with a consistency that falls between custard and jelly. It is best eaten chilled, scooped directly from the half-cut fruit with a spoon.

History and Discovery

Chrysophyllum cainito was formally described by the Swedish naturalist Carl Linnaeus in 1753 in his landmark work Species Plantarum. The genus name Chrysophyllum derives from the Greek words chrysos (gold) and phyllon (leaf), referring to the characteristic golden-bronze coloration on the underside of the leaves. The species name cainito is derived from the indigenous Taino word for the fruit, reflecting its Caribbean origins.

Caimito is native to the Greater Antilles and the Caribbean lowlands of Central America. Spanish colonizers encountered the tree in the West Indies during the 16th century and were captivated by its sweet fruit and striking ornamental appearance. The tree was transported across the Spanish colonial trade routes, arriving in the Philippines via the Manila-Acapulco galleon trade during the 16th and 17th centuries alongside many other New World fruits such as cacao, papaya, and avocado.

In the Philippines, caimito quickly became naturalized and integrated into Filipino backyard agriculture. The tree thrived in the Philippine tropical climate and became associated with provincial life, childhood memories of climbing trees, and the anticipation of the short but beloved fruiting season. Today, caimito trees are found throughout the archipelago, from the suburban lots of Metro Manila to the rural backyards of the Visayas and Mindanao, and the fruit remains a seasonal market favorite each dry season.

How to Plant Caimito

Propagation methods: Seed, Grafting, Air-layering (marcotting)

Germination time: 14 to 30 days from fresh seed

Best planting season in the Philippines: June to August, at the onset of the rainy season

Step-by-Step Planting Guide

1. Select your planting material. For the fastest fruiting results, purchase a grafted seedling from a DOST-accredited or DA-certified nursery. Grafted caimito trees produce fruit in 4 to 6 years, while seedling-grown trees may take 7 to 10 years. If propagating from seed, use fresh seeds extracted from fully ripe fruit, as caimito seeds lose viability quickly once dried.
2. Prepare seeds or seedlings. For seeds, wash off any adhering flesh (which contains germination inhibitors) and plant immediately in moist potting soil about 1 cm deep. For grafted seedlings, keep the root ball intact and water the nursery bag thoroughly the day before transplanting to minimize root disturbance.
3. Choose your planting site. Select a permanent location with full sun and deep, well-drained soil. Caimito grows into a very large tree — allow a minimum spacing of 8 to 10 meters from buildings, power lines, and neighboring trees. The tree's spreading canopy will eventually shade a large area, so plan accordingly for the future landscape.
4. Dig the planting hole and amend soil. Excavate a hole twice the diameter and 1.5 times the depth of the root ball. Mix the excavated soil with generous amounts of compost or aged animal manure at a ratio of 3 parts soil to 1 part organic matter. If your soil is heavy clay, incorporate coarse sand to improve drainage. Caimito roots are sensitive to waterlogging.
5. Plant and water thoroughly. Position the seedling at the same depth it was growing in the nursery container. Backfill with the amended soil mix, firming gently around the roots to eliminate air pockets. Water deeply and apply a 10 cm layer of organic mulch (coconut coir, dried leaves, or rice straw) in a ring around the base, keeping mulch 15 cm away from the trunk to prevent collar rot.
6. Stake and protect the young tree. Drive a sturdy bamboo stake beside the trunk and tie loosely with soft cloth to provide wind support during the first two years. In areas with strong typhoon exposure, a three-stake support system is advisable. Protect the young trunk from string trimmers and lawnmowers, which can damage the bark and introduce disease.

Care Guide

Sunlight

Requirement: Full Sun

Caimito thrives in full sun with at least 6 to 8 hours of direct sunlight daily. As a canopy tree in its natural habitat, it is adapted to growing above the forest understory to capture maximum sunlight. In the Philippine setting, plant caimito in open areas away from taller structures or trees that might shade it during its early years. Once established and reaching above surrounding vegetation, the tree receives abundant light on its own massive canopy.

Water

Frequency: 2 to 3 times per week (young trees); reduced once established

Water young caimito trees regularly during the dry season, providing deep soaking two to three times per week for the first two to three years. Once established, the tree's deep root system makes it moderately drought-tolerant, though consistent moisture during flowering and fruit development (typically December through March) is crucial for a good harvest. During the rainy season, supplemental watering is rarely needed. Avoid waterlogging at all times — caimito roots can rot in poorly drained soil.

Soil

Type: Deep Loam, Sandy Loam, Clay Loam (with good drainage)

pH Range: 5.5 to 7.5

Caimito is adaptable to a range of soil types found across the Philippines, from the volcanic loam of Laguna to the sandy coastal soils of Quezon province. It performs best in deep, well-drained loamy soil rich in organic matter. The tree tolerates slightly acidic to neutral pH. Heavy clay soils should be amended with organic matter and sand before planting to ensure adequate root aeration and drainage. Caimito develops a deep taproot, so avoid planting in areas with high water tables or compacted subsoil.

Humidity and Temperature

Humidity: 60 to 85%

Temperature: 25°C to 38°C

The Philippine tropical lowland climate is ideal for caimito cultivation. The tree thrives at temperatures between 25°C and 38°C and is adapted to the high humidity of Southeast Asian monsoon climates. It performs best in areas with a distinct dry season (which triggers flowering and fruit set) followed by a wet season (which supports vegetative growth). Caimito is not frost-tolerant and does not perform well at elevations above 1,000 meters in the Philippines where temperatures regularly drop below 15°C.

Fertilizer

Apply complete fertilizer (14-14-14) at a rate of 200 grams per year of tree age, split into two applications: one at the start of the rainy season (June) and one at the onset of the dry season (November). For mature fruiting trees, increase potassium by applying muriate of potash (0-0-60) at 100 grams per tree during the flowering period to improve fruit size and sweetness. Supplement with organic compost or aged manure worked into the root zone annually. Avoid heavy nitrogen fertilization during the fruiting period, as this promotes leaf growth at the expense of fruit development.

Pruning

Unlike malunggay or other shrubby food plants, caimito requires minimal pruning once its canopy structure is established. During the first three years, prune only to develop a strong central leader and remove any competing vertical branches. Once the tree matures, limit pruning to the removal of dead, diseased, or crossing interior branches. Light canopy thinning after harvest improves air circulation and light penetration, which promotes better fruit set the following season. Never top a caimito tree — this destroys the natural canopy form and results in weak, disease-prone regrowth.

Growing Medium Options

Caimito is exclusively a ground-planted tree due to its eventual size of 10 to 20 meters in height with a massive root system. There is no practical way to grow a fruiting caimito tree in hydroponic or passive water culture systems. The tree requires deep, well-drained soil that allows its taproot to anchor firmly — this is essential for wind resistance during Philippine typhoon season. Young seedlings can be raised in large nursery bags (at least 30 cm diameter) for the first 1 to 2 years before transplanting to their permanent ground location, but indefinite container culture is not viable for fruit production.

Edible Uses and Nutrition

Edible parts: Fruit (pulp/flesh only — avoid skin and latex)

Culinary Uses

Caimito is primarily eaten fresh as a dessert fruit in the Philippines. The traditional Filipino way to enjoy caimito is to chill the ripe fruit in the refrigerator for several hours, then slice it crosswise to admire the star-shaped seed pattern before scooping out the creamy flesh with a spoon. The flesh has a delicate, milky-sweet flavor often compared to condensed milk or sweet custard, with a soft, gelatinous texture that melts in the mouth. Many Filipinos drizzle a small amount of calamansi juice over the flesh for a sweet-sour contrast.

Beyond fresh eating, caimito flesh is used in Filipino fruit salads, blended into smoothies and milkshakes, and occasionally made into jam or preserves. In some Visayan provinces, the fruit is used in halo-halo variations during peak season. The fruit does not keep well after cutting due to oxidation and latex browning, so it is best consumed immediately. Street vendors and talipapa markets sell caimito by the piece or kilogram during the February to April season at prices typically ranging from 60 to 150 pesos per kilogram depending on size and variety.

Nutritional Highlights

Harvest time: February to April in the Philippines (4 to 6 years after planting for grafted trees). Fruit is ready when it yields slightly to gentle pressure and detaches easily from the stem.

Storage: Ripe caimito is highly perishable and best consumed within 2 to 3 days of harvest. Refrigerate whole, uncut fruit to extend freshness to about 5 days. The fruit does not ripen further after picking, so harvest only when fully ripe. Freezing the pulp is possible for smoothie use but the texture changes significantly upon thawing.

Air Quality and Oxygen Production

Caimito is an outstanding oxygen producer and carbon dioxide absorber due to its large, dense, evergreen canopy that remains photosynthetically active year-round in the Philippine climate. A single mature caimito tree, with its broad canopy spanning 8 to 12 meters in diameter, contributes significantly to localized air quality improvement in residential areas. The large, leathery leaves are efficient at trapping airborne particulate matter, making caimito particularly valuable as an urban shade tree along busy roads and in school compounds.

CO₂ absorption: High

The tree's value as an air quality asset extends beyond oxygen production. Its dense, year-round foliage serves as an effective sound barrier and windbreak in urban settings. The golden-bronze leaf undersides also reflect light upward, creating a cooler microclimate beneath the canopy that reduces the urban heat island effect. Planting caimito trees in Philippine neighborhoods is recommended by urban forestry programs as a multi-benefit strategy: shade provision, fruit production, air quality improvement, and aesthetic enhancement all in one long-lived tree.

Toxicity and Safety

Fruit flesh: Non-toxic, safe to eat

Latex/sap: Mildly irritating — avoid contact with skin and lips

Pets: Fruit flesh is non-toxic; latex may cause mild oral irritation

The ripe flesh of caimito fruit is completely safe for human consumption and is enjoyed by millions of Filipinos each season without any adverse effects. However, the tree produces a milky white latex present in the bark, leaves, unripe fruit, and fruit skin that is mildly irritating on contact. This latex is notoriously sticky and can adhere to the lips, causing an unpleasant tight, dry sensation if one bites through the skin rather than scooping out the flesh. The latex is not dangerous or toxic — it is simply a physical irritant due to its adhesive properties.

For pets, the fruit flesh poses no toxicity risk, though dogs and cats rarely show interest in caimito. The main concern is the latex in bark and leaves, which could cause mild oral irritation if a pet chews on branches. The seeds should not be consumed in large quantities, though occasional accidental ingestion is not harmful. Overall, caimito is considered a safe tree to have in a family garden with children and pets, with the main precaution being to teach children to avoid biting the skin and to wash hands after handling cut fruit.

Common Pests and Diseases in the Philippines

Pests

• Fruit flies (Bactrocera spp.) — the most damaging pest of caimito in the Philippines. Adult flies lay eggs in ripening fruit, and the larvae feed on the flesh. Control with fruit fly traps (methyl eugenol baits) and by harvesting fruit promptly at maturity. Bagging individual fruit clusters with paper or plastic bags 2 to 3 weeks before harvest is an effective organic control method.
• Scale insects — appear as small, waxy bumps on branches and leaf undersides, sucking plant sap and weakening the tree. Control with horticultural oil spray applied during the dry season when populations are most concentrated.
• Mealybugs — white, cottony insects that cluster on young shoots and developing fruit. Spray with neem oil solution or introduce natural predators such as ladybird beetles.

Diseases

• Anthracnose — a fungal disease that causes dark, sunken lesions on ripening fruit, especially during wet weather. Improve air circulation through canopy pruning and apply copper-based fungicide before the fruiting season if the disease was present the previous year.
• Root rot (Phytophthora) — occurs in poorly drained soils, causing wilting and dieback. Prevention through proper site selection and drainage is the only effective approach, as treatment of established root rot is difficult in large trees.