Plant of the Month for September, 2014
This plant won’t win an award for its flowers, but it is a very versatile plant that grows well in sun, part shade, full shade, moist or very dry. It has a nice light green colour all summer and gives a good red fall show. For a shade garden, it is a true competitor to hostas.
Diervilla lonicera;photo by Robert Pavlis
For an uncommon plant, Diervilla lonicera sure has a lot of common names including bush honeysuckle, low bush honeysuckle, northern bush honeysuckle dwarf bush honeysuckle, and yellow flowered upright honeysuckle. It is an Ontario native that is not very common in either the wild or the garden.
The small yellow flowers are protogynous, where the pistil matures before the pollen, and plants are self-sterile. It is host to the Fawn Sphinx Moth.
Diervilla lonicera;photo by Robert Pavlis
In full sun the plant grows and spreads quickly with suckers. In full shade it is a much slower growing shrub, but it seems happy in full shade under sugar maples. After 3 years in part shade in the author's garden, the plant has not started to sucker.
Life Cycle: shrub
Height: 120 cm (3 ft)
Bloom Time: mid-summer
Natural Range: Eastern North America
Habitat: dry rocky open woodland areas
Synonyms: Diervilla diervilla, Diervilla lonicera var. hypolmalaca, Diervilla trifida,Diervilla canadensis, Lonicera diervilla
Cultivation:
Light: full sun to full shade
Soil: well drained
Water: medium to dry, tolerates drought
USDA Hardiness Zone: 3– 7
Propagation: suckers, cuttings, seed
Seedex availability (ORG&HPS annual Seed Exchange): rarely