The Black Diamond Guava (sometimes called Black Guava or Dang Ayothaya 3) is a rare, exotic variety that has recently gained massive popularity, particularly in Thailand and India. It is prized as a "superfruit" for its dramatic color contrast and high antioxidant content.
Unlike traditional varieties, this guava is as much an ornamental showpiece as it is a food crop.
1. Physical Characteristics
Skin: This is the fruit’s most striking feature. The skin is a deep, dark purple that turns almost jet black when fully ripe. This dark pigmentation is caused by high levels of anthocyanins (the same antioxidants found in blueberries).
Flesh: Inside, the fruit offers a startling contrast with vibrant ruby-red or deep pink pulp. The flesh is thick, juicy, and less grainy than common wild guavas.
Size: The fruits are typically medium to large, usually weighing between 200g and 500g.
Foliage: Even the tree is distinct; while the leaves are generally green, the new growth and young stems often have a reddish or purplish tint, and some cultivars even sport glossy, dark-toned leaves.
2. Flavor Profile
Taste: It is exceptionally sweet with a "complex" tropical flavor. It is often described as a blend of traditional guava, strawberry, and a hint of floral notes. It lacks the sharp muskiness of some yellow varieties.
Texture: The flesh is soft and melting when fully ripe, though it maintains a pleasant crispness if eaten slightly early.
Seeds: It contains small, edible seeds, though they are generally fewer and softer than those in common field guavas.
3. Nutritional "Superfruit" Status
Because of its dark coloration, the Black Diamond Guava is marketed for its superior health benefits:
Antioxidants: Rich in anthocyanins (in the skin) and lycopene (in the red flesh).
Vitamin C: Contains significantly more Vitamin C than citrus fruits—often up to 250mg per 100g.
Anti-Aging: Frequently cited in Southeast Asian traditional medicine for its anti-aging properties and immune-boosting capabilities.
4. Growing Information
Climate: Best suited for tropical and subtropical regions (Zones 9-11). It loves heat and full sun; the more sunlight it receives, the darker the skin becomes.
Pot Culture: Because it has a naturally compact and bushy growth habit, it is one of the best varieties for container gardening or terrace gardens.
Fruiting Time: Grafted or layered plants are very fast to produce, often bearing fruit within 1 to 2 years of planting.
Yield: It is a high-yielding variety that can often fruit year-round in ideal tropical conditions.
