Trabzon Persimmon (Diospyros kaki)

Trabzon persimmon (Diospyros kaki) is a fruit species adapted to subtropical and warm temperate climates. Native to China, this species gradually spread to Japan and from there to other East Asian countries. Today, it is most intensively cultivated in China, Japan, Brazil, Korea, and Italy, with production also occurring in Israel, the United States, New Zealand, Australia, Spain, Georgia, Egypt, Türkiye, Iran, and Chile.

In Türkiye, the Trabzon date which is primarily grown in the Mediterranean Region, can also be cultivated in the Black Sea, Marmara, and Aegean regions due to its deciduous nature in winter. The provinces with the most intensive cultivation include Hatay, Adana, and Mersin.

Varieties

Trabzon persimmon varieties are divided into two main groups based on fruit characteristics:

Astringent Varieties

Non-Astringent Varieties

Trabzon Persimmon Illustration. (Generated by YZ.)

Ecological Requirements

Climate

Trabzon persimmon adapts well to subtropical climates with mild winters. During its dormancy period, it can withstand temperatures as low as –17/–18 °C, but leaves are damaged at –3 °C during the growth phase. A long period of 140–160 days is required for fruit ripening. High temperatures may cause sunburn on the fruit surface, while high humidity positively affects fruit quality.

Soil

This species can adapt to various soil conditions except for high salinity. Optimal growth occurs in deep, well-drained soils rich in organic matter and nutrients, with a medium-heavy texture and a pH of 6.5–7.0.

Diseases and Pests

The most common diseases affecting Trabzon persimmon include root cancer, anthracnose, fruit rot, leaf spot disease, and scald. Among pests, the Mediterranean fruit fly and citrus mealybug are most significant, while some mites and thrips also cause damage.

Trabzon Persimmon on a Market Stall Illustration. (Generated by YZ.)

Production Status in Türkiye

Türkiye’s Trabzon persimmon production increased from 10,000 tons in 1990 to 34,650 tons in 2016. However, no significant increase in yield per tree has been achieved. The largest production occurs in the Mediterranean Region (49.2%), followed by the Aegean, Marmara, Black Sea, and Southeastern Anatolia regions. Yield per tree ranges from 19 to 72 kg, reflecting differences in ecological suitability and cultural practices.

Main Challenges in Cultivation

• Flower structure and pollination: Trabzon persimmons have three flower types: male, female, and hermaphroditic. Female flowers are most important for yield. Inadequate pollination and failure to use suitable pollinator varieties reduce fruit set.
• Parthenocarpy and pollination: Some varieties can produce fruit without pollination. However, pollination may alter fruit characteristics such as astringency and flesh color.
• Bee activity: Insufficient bee populations during flowering can negatively affect fruit set.
• Climate risks: This species, which requires chilling, may suffer damage from early temperature increases.
• Sunburn: Sunburn negatively affects fruit surface quality and shelf life. Balanced canopy structure and shading methods are recommended to mitigate this issue.
• Wind damage: Trees with brittle branches are susceptible to damage from winds, especially before harvest.
• Fruit drop: Excessive fruit set, water imbalance, nutrient deficiencies, and pest infestations can cause fruit drop.

Marketing and Consumption Challenges

Most varieties produced in Türkiye exhibit astringency at harvest, which can lead to negative consumer perception if not properly understood. Increasing production of non-astringent, firm, colorful, durable, and seedless varieties can encourage consumption. Additionally, factors such as packaging, standardization, and ripeness level are crucial in presenting the fruit to consumers.

Recommendations and Future Outlook

• Market-adapted (non-astringent) varieties should be preferred.
• Harvest periods should be diversified to extend marketing duration.
• Production should be concentrated in specific regions to enhance mass production and export potential.
• Post-harvest practices that minimize damage should be adopted.
• Consumer awareness and visual promotion campaigns should be implemented to increase recognition of the fruit.
• Its use in drying and as functional food should be encouraged.
• Market value can be enhanced through organic, contract-based, and certified production systems.