Gaylussacia frondosa is a species of flowering plant in the heath family known by the common names dangleberry and blue huckleberry.

It grows with other related plants such as highbush blueberry (Vaccinium corymbosum), hillside blueberry (V. pallidum), Lyonia spp., sheep-laurel (Kalmia angustifolia), wintergreen (Gaultheria procumbens), dwarf huckleberry (Gaylussacia dumosa), and black huckleberry (G.

During this time the loose hanging fruits turn from green to dark blue and black as they mature.

[9][10][11] This plant is native to the East coast of the United States from New Hampshire and as far west and south as Mississippi.

It is found in the wetland regions of Atlantic and Gulf Coastal Plain, Eastern Mountains and Piedmont, and Northcentral & Northeast.

[13] It is very common in the pine barrens of New Jersey and the eastern piedmont and coastal plain of North and South Carolina.

[16] Gaylussacia frondosa is often found near other similar ericaceous shrubs such as the highbush blueberry (Vaccinium corymbosum), hillside blueberry (V. pallidum), Lyonia spp., sheep-laurel (Kalmia angustifolia), wintergreen (Gaultheria procumbens), dwarf huckleberry (Gaylussacia dumosa), and black huckleberry (G.

Many birds, including sharp-tailed grouse, greater prairie chicken, wild turkey, and mourning dove as well as mammals like black bears and racoon eat the berries.

[22] These pollinators often feed on the nectar of the pink or white flowers when they bloom from the plant in the spring.

Blue huckleberry is a host plant for the larvae of Callophrys henrici, also known as Henry's Elfin butterfly, which appear from February to May.

Low-intensity fires have been found to encourage vegetative growth in this plant and stimulate sprouting.

In addition, fires that are too frequent could also badly damage these root systems and reduce populations of this shrub.