Blueberry Pollination Chart: Compatibility & Bloom Guide

How Blueberry Compatibility Works

Tetraploid group: northern highbush, southern highbush, compact highbush, half-high, and the lowbush cultivars in this chart are treated as one practical 4x group. Oregon State reports that northern highbush cultivars are mutually compatible and that lowbush can receive pollen from another lowbush or a highbush. Bloom overlap still decides whether a particular pairing is useful.

Hexaploid group: rabbiteye cultivars need another genetically different rabbiteye with overlapping bloom. Pink Lemonade is a hexaploid rabbiteye-highbush hybrid and is placed with the rabbiteye group. Do not rely on a tetraploid highbush or lowbush as the only pollenizer for a rabbiteye.

Good means different cultivars in the same practical group and the same charted bloom window, or a direct University Extension companion-pollinizer recommendation. Direct cultivar guidance overrides the five broad bloom categories because flowering periods overlap at their edges. Partial means the same practical group but neighboring bloom windows without a stronger direct recommendation. Not compatible means a 4x/6x mismatch or bloom windows separated by two or more groups without documented overlap. Blueberries do not use the named S-allele incompatibility groups shown in sweet cherries; cultivar-specific pollen-donor effects can still change berry set, size, and ripening even among compatible pairs. Hover any cell for the exact reason.