The Euxine-Colchic broadleaf forests form a narrow temperate forest belt along the southern shore of the Black Sea, running from the southeastern corner of Bulgaria across the northern coast of Turkey to the lowlands of Georgia. These mixed forests are dominated by deciduous trees such as Oriental beech, sweet chestnut, hornbeam, and black alder, interwoven with conifers including Nordmann fir and Caucasian (oriental) spruce. The climate splits into two zones: the eastern Colchic region is exceptionally humid, averaging 1,500 to 2,500 mm of annual precipitation, while the drier western Euxine region receives about 1,000 to 1,500 mm. Sheltered by mountains, the area served as a glacial refuge and retains relict species, with the endemic Caucasian salamander as its flagship animal, yet it is classified as critical or endangered due to logging and habitat loss. For gardeners, the region is also the native home of the Pontic rhododendron (Rhododendron ponticum), a relict species long grown as an ornamental.

At a glance

About the temperate broadleaf & mixed forests biome

Four-season forests of deciduous hardwoods — oak, maple, beech — often mixed with conifers, shaped by warm summers and cold winters. Trees leaf out in spring and color in autumn; the generally fertile soils have made these forests heavily settled and farmed.

Catalog plants suited to this ecoregion

Computed from each plant's stated USDA zone range against this ecoregion's CHELSA-derived current zone range, with the CHELSA mid-century warming delta applied for the projection. Plants whose stated range falls outside both the current and projected zone end up dropped; the rest land in one of the three buckets below.

Collections for this ecoregion

Curated multi-plant collections whose members all fit this ecoregion's zone range — no won't-grow members smuggled in. Overall fit class shown per collection is the weakest link across its members.

Related ecoregions