1. Origin and harvest timing
Most of a durian’s eventual quality is determined before it leaves the orchard. Variety, growing conditions, tree care and harvest timing shape how aroma, flavour and texture develop after harvest.
Thailand’s Department of Agriculture has reinforced controls against immature fruit, pest damage, origin misuse and safety risks—showing that quality is a multi-factor discipline.
2. Five premium control points
A dependable selection system connects every stage instead of relying on a single visual check.
- Origin: identify the orchard and its management history.
- Maturity: assess the fruit with variety- and market-appropriate criteria.
- Grading: inspect shape, health, defects and handling damage.
- Postharvest care: keep handling clean and minimise impact or unsuitable storage.
- Customer guidance: clearly communicate ripeness, storage and the best eating window.

3. What customers can check
Look for variety, origin, packing or selection date, recommended ripeness and a clear support channel. For fresh-cut durian, check packaging hygiene, even flesh condition and appropriate temperature control.
Choose a seller who can explain how the fruit was selected—not merely claim that it is the best.
4. The Siam Diamond context
Siam Diamond connects orchard-level selection, ripeness preference and meaningful gifting. This shifts competition away from price alone toward consistency, customer understanding and a verifiable product story.
For Thai fruit brands, premium positioning must become operating criteria understood by orchards, packhouses, sales teams and logistics partners.



