The Metropolitan Tree Improvement Alliance

METRIA, the Metropolitan Tree Improvement Alliance, was founded in 1976 to provide opportunities for collaboration among members in developing better trees for metropolitan landscapes.

METRIA's objectives are :

To provide information that will enable wiser choices of species or cultivars for particular urban environments and uses; and information about managerial techniques that will lead to healthier, more beautiful trees.

To develop tree cultivars having improved characteristics through breeding, selection and propagation; and preserve valuable germplasm.

To promote the utilization of improved cultivars and better cultural techniques.

The Metropolitan Tree Improvement Alliance