A new and distinct low-chill blueberry (Vaccinium) variety `HX`. The parent of `HX` is `Avonblue` (unpatented) an interspecific hybrid of several species. `HX` is (a) free flowering without the use of growth regulating chemicals, (b) has the lowest chilling requirement on all commercial cultivar, (c) has the earliest fruiting of all commercial cultivar, (d) is resistant to phytophthora cinnamomii and (e) its fruits ripen uniformly.