GreenTree Forest Products is certified for ISPM 15.

International Standards For Phytosanitary Measures No. 15 (ISPM 15) is an International Phytosanitary Measure developed by the International Plant Protection Convention (IPPC) that directly addresses the need to treat wood materials of a thickness greater than 6mm, used to ship products between countries.

The IPPC edict, known as ISPM 15, gives wood packaging manufacturers the option of heat treatment, requiring that the wood core temperature reaches a minimum of 56 degrees Centigrade (132.8 F), for 30 minutes, OR  that the wood be fumigated to a prescribed specification with methyl bromide. All ISPM 15 compliant wood is then stamped with an approved mark signifying that it meets the ISPM 15 standards.