Herbaceous peony

When sourcing dormant roots, prioritize eye count (buds); a standard commercial grade usually requires 3-5 strong eyes to ensure vigorous growth in the first season. The roots should be firm, plump, and free from mold or soft spots, indicating healthy moisture content. For B2B buyers, it is essential to verify the cultivar purity to ensure the flowers match the specific color and petal form (e.g., single, semi-double, or bomb) requested by your clients.

As live plant material, Herbaceous Peonies must be accompanied by a Phytosanitary Certificate issued by the exporting country's national plant protection organization. This document certifies the plants are free from regulated pests and diseases, such as Botrytis paeoniae or specific nematodes. Buyers must ensure the supplier complies with CITES regulations (if applicable to specific wild species) and regional requirements like USDA APHIS for the US or EU Plant Health Regulations.

For the cut flower industry, select varieties with long, stiff stems (80cm+) and a long vase life, such as 'Sarah Bernhardt'. For landscaping and garden centers, prioritize compact growth habits and disease resistance. If sourcing for medicinal purposes (Radix Paeoniae Alba), the focus shifts from floral aesthetics to the paeoniflorin content and specific processing methods like peeling and drying.

To maintain dormancy and prevent premature sprouting or rot, roots must be shipped in a temperature-controlled environment (0°C to 2°C). The packing medium, often moistened peat moss or wood shavings, must maintain a specific humidity level to prevent desiccation. Ensure the supplier uses perforated packaging to allow for gas exchange, preventing the buildup of ethylene which can damage the buds.

The biggest risk is Customs seizure or destruction due to soil contamination or pest presence. Mitigate this by requiring the supplier to provide soil-free (bare-root) plants that have been thoroughly washed. Always use Trade Assurance services on Made-in-China.com to protect your payment until the goods pass inspection and arrive in the promised condition.

Peonies have a strict seasonal harvest window (typically autumn). Secure better pricing by placing pre-orders 4-6 months in advance. Negotiate a tiered pricing structure based on eye count and volume; for instance, a 15-20% discount is common for orders exceeding 5,000 divisions. Request a batch-testing report for germination rates before final payment.

For intercontinental trade, Air Freight is highly recommended to minimize the time out of cold storage. If using Sea Freight, you must utilize Reefer Containers (Refrigerated Containers) with active monitoring. Ensure the Incoterms clearly define the point of risk transfer, preferably CIF or DAP, to ensure the supplier remains responsible for the health of the plants until they reach a major transit hub.

Verify the supplier's Export License for Live Plants and check their history on Made-in-China.com for 'Audited Supplier' status. Request real-time photos or videos of the specific batch being packed. For large orders, consider hiring a third-party inspection agency (like SGS) to conduct a pre-shipment inspection focusing on root health and eye count accuracy.