Classification
Product TypeRaw Material
Product FormFresh
Industry PositionPrimary Agricultural Product
Raw Material
Market
Fresh longan in the United States is a niche tropical fruit market supplied by limited domestic production (notably South Florida and Hawaii) and imports subject to USDA APHIS phytosanitary controls. In South Florida, harvest is seasonal (mid-July to early September, peaking in August), concentrating local supply into late summer. Imports from certain origins can require specific treatments (e.g., irradiation) and may face distribution restrictions such as prohibitions on entry into Florida for Vietnamese longan under 7 CFR 319.56-70. Quality is highly sensitive to postharvest handling, with pericarp browning and decay driving the need for rapid cooling and disciplined cold chain management.
Market RoleImport-dependent consumer market with limited domestic production (notably South Florida and Hawaii)
Domestic RoleSeasonal niche specialty fruit crop in subtropical U.S. regions; consumed primarily as fresh fruit and sometimes frozen for later use
SeasonalitySeasonal domestic harvest in South Florida from mid-July to early September, peaking in August; imported supply can extend availability outside the domestic harvest window subject to import requirements.
Specification
Primary VarietyKohala
Physical Attributes- Fruit maturity indicator: intense tan peel color at maturity (South Florida guidance).
- Preferred fruit size cited in Florida guidance: approximately 32 mm (1¼ in) diameter or larger.
Compositional Metrics- Florida guidance notes pulp sweetness as a primary ripeness indicator and indicates sweetness does not increase after harvest.
Supply Chain
Value Chain- Hand harvest in clusters → immediate shade → rapid cooling → refrigerated storage/distribution
Temperature- Florida guidance recommends cooling fruit as soon as possible after harvest.
- Florida guidance indicates refrigerated storage for home-harvested fruit of about 5–7 days.
- Postharvest literature reports low-temperature storage (about 1–5°C) is used to reduce decay, with pericarp browning often limiting marketability.
Atmosphere Control- Postharvest literature identifies pericarp browning as a key quality-limiting issue and notes sulfur dioxide fumigation as an effective control approach in commercial contexts, with increasing consumer/regulatory resistance.
Shelf Life- Florida guidance indicates short shelf life at ambient temperatures and about 5–7 days refrigerated for home-harvested fruit.
- Postharvest literature reports refrigeration can extend storage duration but browning and decay remain key constraints, especially after removal from cold storage.
Risks
Phytosanitary HighU.S. market access for fresh longan is highly sensitive to USDA APHIS quarantine pest risk, with origin-specific conditions that can mandate phytosanitary treatments (e.g., irradiation) and impose routing/distribution constraints; for example, Vietnamese longan imports into the continental U.S. are subject to irradiation and carton labeling requiring “Not for importation into or distribution in FL,” which can block Florida entry/distribution for that origin.Verify the exact origin/commodity requirements in APHIS ACIR; lock in required treatment capacity and compliant labeling before shipment; plan routing and sales channels to avoid restricted states/entry where applicable.
Regulatory Compliance MediumFailure to submit timely and accurate FDA Prior Notice for imported longan can trigger refusal/hold actions and delay clearance at the port of entry.Implement a pre-departure documentation checklist that includes FDA Prior Notice submission/confirmation and aligns product description and consignee details with customs entry data.
Quality and Spoilage MediumLongan is prone to rapid quality loss from pericarp browning and microbial decay; cold-chain breaks can lead to cosmetic rejection and shrink, particularly for long-distance imported supply.Use rapid postharvest cooling, maintain continuous refrigeration, and align packaging/handling to minimize moisture loss and physical damage; validate postharvest protocols with suppliers for U.S.-bound shipments.
FAQ
When is longan typically harvested in South Florida?UF/IFAS guidance reports the South Florida longan harvest season runs from mid-July to early September, with most harvest occurring in August.
What are key U.S. import conditions for fresh longan from Vietnam?The Federal Register final rule for Vietnam (79 FR 52543; FR Doc. 2014-21113) requires Vietnamese longan imported into the continental United States to be in commercial consignments, treated with irradiation, and accompanied by a phytosanitary certificate. It also requires cartons be stamped “Not for importation into or distribution in FL.”
Is FDA Prior Notice required for importing fresh longan into the United States, and does FSVP apply?FDA states Prior Notice must be submitted for food that is imported or offered for import into the United States, which includes fruits. FDA also states the FSMA Foreign Supplier Verification Programs (FSVP) rule is final and requires importers to perform risk-based supplier verification activities to help ensure imported food meets U.S. safety standards (unless an exemption applies).