How to Evaluate Tray Fit and Plug Size

Tray fit determines whether a plug works smoothly in production. Buyers should confirm opening diameter, plug height, expansion after hydration and handling workflow using the real tray or holder before a bulk purchase.

Measurements to record before sampling

Measure the top opening, lower opening, usable cell depth and any taper, ribs or drainage features that can contact the plug. A tray drawing is useful, but a clear photograph with a ruler or a physical tray sample can reveal details that drawings miss. During the wet test, note expansion, removal force, stability during movement and whether roots have an unobstructed path into the next growing stage.

Buyer checklist

• Confirm application and target tray or holder.
• Request wet-size data and sample testing before bulk order.
• Clarify packaging format, carton quantity and monthly volume.
• Discuss SGS test report and export documents if required by your market.