ISPM 15 (International Standards for Phytosanitary Measures No. 15) is the global standard for wood packaging material in international trade. Starting January 2026, APHIS (US Department of Agriculture) resumed full enforcement of ISPM 15 hyphen requirements, making compliance more critical than ever for dried flowers exporters using wooden crates or pallets.
Here's what ISPM 15 means for your dried flowers export business:
ISPM 15 Threshold: Applies to all solid wood packaging thicker than 6mm—including crates, pallets, dunnage, and spools used in dried flowers shipments
ISPM 15 Compliance Requirements for Dried Flowers Export Packaging
| Requirement | Specification | Why It Matters | Non-Compliance Consequence |
|---|
| Wood Thickness Threshold | All solid wood >6mm thickness | Thin wood (<6mm) exempt as low pest risk | Shipments with non-compliant wood rejected at customs |
| Debarking | Wood must be completely debarked | Bark harbors pests and diseases | Failed inspection, shipment held |
| Treatment Method | HT (Heat Treatment) or MB (Methyl Bromide fumigation) | Kills pests and larvae inside wood | Untreated wood = automatic rejection |
| Marking/Stamp | Must display ISPM 15 mark with country code, facility code, treatment method | Provides traceability and proof of compliance | No mark = assumed non-compliant, cargo destroyed or returned |
| Documentation | Phytosanitary certificate must reference ISPM 15 compliance | Links packaging to official certification | Missing documentation = customs delays |
ISPM 15 stamp components: Country Code (e.g., MY for Malaysia) + Facility Code (unique to each treatment provider) + Treatment Method (HT or MB). Enforcement resumed January 2026 with stricter hyphen requirements.
Packaging Options for Dried Flowers Export:
1. Cardboard Boxes (No ISPM 15 Required): Suitable for air freight, small orders (<50kg), and regional ASEAN shipments. Advantages: no treatment cost, lighter weight, lower shipping cost. Disadvantages: less protection for long-distance ocean freight, moisture sensitivity. Best for: sample orders, premium air-freight shipments to EU/US.
2. ISPM 15-Compliant Wooden Crates: Required for ocean freight, large orders (>100kg), and markets with strict biosecurity (Australia, New Zealand). Advantages: superior protection, stackable for container optimization, meets all market requirements. Disadvantages: 10-15% higher packaging cost, treatment lead time 3-5 days. Best for: bulk orders, long-distance shipments, Australia/New Zealand markets.
3. Plastic Containers + Wooden Pallet (ISPM 15): Hybrid approach—flowers in moisture-proof plastic containers, mounted on ISPM 15-treated wooden pallets. Advantages: moisture protection, ISPM 15 compliance, reusable. Disadvantages: higher upfront cost, return logistics for reusable containers. Best for: repeat orders to same buyer, premium preserved flowers.
Moisture Content Standard: Export-grade dried flowers must maintain 8-12% moisture content. Below 8% = brittle and prone to breakage; above 12% = mold risk during transit