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Blue Daphne

Daphne genkwa (DAF-nee GEN-kwah)

Family: Thymelaeaceae Non-native Shrub (3-15 ft)

Lilac daphne is an erect, mounding, ornamental, broadleaf deciduous shrub that grows up to 3 to 5 feet tall, equally as wide, and is native to Central and Southern China. It is found in the margins of paddy fields, hillsides, and valleys. This sparsely branched shrub has clusters of lilac, reddish-purple, or white tubular flowers in the spring, followed by dull green, lanceolate to ovate leaves. Small white to reddish fruits may appear, but are sometimes absent in cultivation. The genus name, Daphne, is derived from the Ancient Greek word meaning "laurel." The specific epithet, genkwa, is the Japanese pronunciation of its Chinese name. The lilac daphne is a member of the daphne family (Thymelaeaceae). This plant performs best when grown in a location that experiences hot summers and somewhat mild winters. It thrives in full sun with afternoon shade to partial shade and moist, well-drained loam, sandy, or clay soils with an acidic to neutral pH. Once planted, it is best not to attempt to relocate this plant. It does not like its roots disturbed. Full maturity is reached at about 5 years of age. It is drought-tolerant once established and deer-resistant. Reportedly, the lilac daphne is difficult to propagate. The flower buds develop in the fall on the current year's growth. In areas with very cold winters, the buds may not survive through the winter temperatures, which in turn leads to the absence of flowers the following year. It flowers on bare stems before its gray-green foliage opens. Consider the lilac daphne as a specimen or in groups in a cottage garden, woodland garden, or near a deck or patio settings. Be aware that all parts of this plant are poisonous if ingested. Keep this shrub out of the reach of pets or children. Insects, Diseases, and Other Plant Problems: Daphnes are susceptible to root and crown rot, leaf spots, and viruses. Potential insect pests include aphids, mealybugs, and scale. This shrub is short-lived in cultivation. All parts of this plant are poisonous.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 69 attributes.

How it fits the guild

Guild layer 3 - Shrub (3-15 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Often confused with Syringa oblata Syringa reticulata
Fills a similar niche Aesculus sylvatica Rhododendron hybrids Robinia pseudoacacia

Full plant profile

Growing Conditions
Plant type
Poisonous; Shrub
Life cycle
Woody
USDA zones
5a, 5b, 6a, 6b, 7a, 7b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
Available space
3 feet-6 feet
NC region
Mountains; Piedmont
Mature size
Height: 3 ft. 0 in. - 5 ft. 0 in. | Width: 3 ft. 0 in. - 5 ft. 0 in.
Growth rate
Slow
Maintenance
Low
Canopy layer
3 - Shrub (3-15 ft)
Form & Appearance
Habit / form
Erect; Mounding; Open
Texture
Medium
Foliage
Deciduous
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Alternate; Opposite
Leaf shape
Lanceolate; Ovate
Leaf margin
Entire
Leaf feel
Leathery
Leaf size
1-3 inches long, < 1 inch wide
Hairs present
Yes
Leaf detail
The leaves are simple and mostly opposite leaves, however, some are alternate. The leaf is green on the upper surface, and paler green beneath, lanceolate to ovate. Silky hairs can be found on both sides of the leaves when they first appear. Gradually they will become obsolete, only remaining along the veins on the underside. Each leaf measures 1 to 2.5 inches long and 0.5 to 1 inches wide.
Fall color
Gold/Yellow
Flower color
Purple/Lavender
Flower value
Fragrant; Showy
Flower shape
Tubular
Flower size
< 1 inch
Flower detail
Flowering occurs in the spring from March to May before the leaves open. The flowers appear in clusters of 2 to 7 blooms. Each bloom is tubular and is almost 0.5 inches long. The slightly fragrant flowers can be lilac, rose-purple, or white.
Bloom time
Spring
Fruit color
Black; Red/Burgundy; White
Fruit type
Drupe
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
The fruits are small and white to reddish and appear from June to July. Frequently, they are not seen in cultivated shrubs. The fruit is black when dried.
Stem color
Brown/Copper; Gold/Yellow; Green; Purple/Lavender
Stem detail
The stems are thin, and the shrub is sparsely branched. The stems may be yellowish-green to purplish-brown.
Wildlife & Ecology
Native status
Non-native
Origin
Central and South China to Temperate Eastern Asia
Distribution
Native: China North-Central, China South-Central, China Southeast, Japan, Korea, and Taiwan
Wildlife value
Attractive to pollinators. Bees, flies, butterflies and moths are pollinators of this plant.
Attracts
Bees; Butterflies; Moths; Pollinators
Play value
Attractive Flowers; Colorful; Easy to Grow
Food & Medicine
Harvest time
Summer
Fruit type
Drupe

Uses (ethnobotany)

Parts of this plant have been used as a pesticide. The dried flower buds are used for medicinal purposes in China.

Landscape Use
Landscape location
Lawn; Meadow; Patio; Pool/Hardscape; Walkways
Landscape theme
Butterfly Garden; Cutting Garden; Pollinator Garden; Rock Garden; Winter Garden
Design feature
Accent; Border; Hedge; Mass Planting; Screen/Privacy; Specimen
Garden tags
#deciduous #poisonous #showy flowers #fragrant flowers #pollinator plant #fly friendly #shrub #moth caterpillar host #deciduous shrub #rock garden #butterfly friendly #bee friendly #moth friendly #short lived #problem for dogs #problem for cats #green leaves #poisonous if ingested #spring flowers #erect #problem for children #lilac flowers #flowering shrub
Problems & Resistance
Problems
Poisonous to Humans; Problem for Cats; Problem for Children; Problem for Dogs; Short-lived
Resistant to
Deer; Diseases; Drought; Heat
Propagation
Root Cutting
Poison severity
High
Poison parts
Bark; Flowers; Fruits; Leaves; Roots; Sap/Juice; Seeds; Stems
Poison symptoms
HIGHLY TOXIC, MAY BE FATAL IF EATEN! All parts of the plant are poisonous to humans if ingested. Symptoms include ulceration of the mouth, esophagus, and stomach, drooling, vomiting, bloody diarrhea, arrhythmias, delirium, seizures, coma, and death. Ingesting 10 to 12 berries can be fatal. Contact with this shrub can cause severe skin irritation.
Toxic principle
daphnetoxin and mezerein
Contact dermatitis
Yes
Toxicity summary
High severity poison; parts: Bark; Flowers; Fruits; Leaves; Roots; Sap/Juice; Seeds; Stems; contact dermatitis

Planted at Hunnicutt

Nobody’s planted this one yet.