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Caucasian Rockcress

Arabis caucasica (AR-uh-biss kaw-KAS-ee-kuh)

Family: Brassicaceae Non-native Herbaceous (1-3 ft)

This showy, sprawling evergreen perennial is native to crevices of limestone rocks, along streams and in calcareous alpine meadows of Europe. It has naturalized in Canada and parts of the northern U.S. Ideal conditions for growth include a location with full sun and gritty, alkaline, well-drained soil. Once planted, it is advisable to let the plant remain in that spot as it does not like its roots disturbed. The sweet-scented flowers are typically white, however, varieties pink or rose. Cut back foliage after bloom to promote denser growth habit. This will also encourage healthier foliage growth. Failure to cut back can lead to long, bare branches with foliage only appearing at the ends, and will also limit the spread of its rhizomes. The leaves are edible, primarily used as a garnish. Wildlife Value: Members of the Arabis genus support the following specialized bees: Andrena (Scaphandrena) arabis. This plant is deer and rabbit resistant. Insects, Diseases, and Other Plant Problems: No serious insect or disease problems. Aphids are an occasional issue. Root rot, white rust, and downy mildew may occur in overly moist or poorly drained soils. Plants tend to suffer in summer heat south of Zone 6.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 59 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft) Optimal soil pH Acid (<6.0); Alkaline (>8.0); 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.

Full plant profile

Growing Conditions
Plant type
Ground Cover; Herbaceous Perennial
Life cycle
Perennial
USDA zones
4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b
Light
Full sun (6 or more hours of direct sunlight a day)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Occasionally Dry
Available space
12 inches-3 feet
NC region
Mountains
Mature size
Height: 0 ft. 6 in. - 1 ft. 0 in. | Width: 0 ft. 6 in. - 1 ft. 6 in.
Growth rate
Medium
Maintenance
Low
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Mounding; Spreading
Texture
Fine
Leaf color
Gray/Silver; Green
Leaf type
Simple
Leaf arrangement
Rosulate
Leaf shape
Obovate; Spatulate
Leaf margin
Dentate; Denticulate; Entire
Leaf value
Showy
Leaf size
1-3 inches long, 1-3 inches wide
Hairs present
No
Leaf detail
This plant has loose spreading rosettes of 2-inch long toothed, obovate, gray-green basal leaves. The foliage is very attractive cascading over walls or in a rock garden and makes an effective groundcover.
Flower color
White
Flower value
Fragrant; Good Cut; Showy
Flower form
Raceme
Flower shape
Star
Flower size
< 1 inch
Flower detail
This plant has tiny, 4-petaled, 1/2" long white flowers bloom in spring. The blooms make excellent cut flowers.
Bloom time
Spring
Fruit color
Brown/Copper
Fruit detail
The seed pods will dry on the plant. Once dried, they can be opened to collect the seeds.
Stem detail
Multi-stemmed and erect.
Wildlife & Ecology
Native status
Non-native
Origin
Mediterranean, Crimea, Turkey, Iran, Causcus
Wildlife value
Members of the Arabis genus support the following specialized bees: Andrena (Scaphandrena) arabis. This plant is deer resistant. Butterflies are attracted to the flowers.
Attracts
Bees; Butterflies; Pollinators; Specialized Bees
Play value
Attracts Pollinators; Easy to Grow; Fragrance; Wildlife Food Source; Wildlife Larval Host
Food & Medicine
Edible parts
Leaves
Harvest time
Spring; Summer

Edibility

The leaves are edible.

Uses (ethnobotany)

Ground cover

Landscape Use
Landscape location
Container; Meadow; Naturalized Area; Patio; Slope/Bank
Landscape theme
Butterfly Garden; Drought Tolerant Garden; Edible Garden; Pollinator Garden; Rock Garden
Design feature
Border; Mass Planting
Garden tags
#showy flowers #specialized bees #evergreen #full sun tolerant #drought tolerant #white flowers #deer resistant #spring flowers #alpine #groundcover #pollinator plant #spring interest #sandy soils tolerant #rocky soils tolerant #garden walls #stream banks #rock garden #dry soils tolerant #bee friendly #cutting garden #heat tolerant #rabbit resistant #edible leaves #fragrant flowers #compact #perennial #butterfly friendly #wildlife friendly #meadow #poor soil tolerant
Problems & Resistance
Insect problems
Aphids on Ornamental Landscape Plants; Aphids Found on Flowers and Foliage
Resistant to
Deer; Drought; Dry Soil; Heat; Poor Soil; Rabbits
Particularly resistant to
dry, sandy, or rocky soil; drought; somewhat infertile soils
Propagation
Division; Seed; Stem Cutting

Planted at Hunnicutt

Nobody’s planted this one yet.