Photo by Melody

PlantFiles: Tower rockcress
Arabis glabra

Family: Brassicaceae (brass-ih-KAY-see-ee) (Info)
Genus: Arabis (AR-uh-biss) (Info)
Species: glabra (GLAY-bruh) (Info)


36-48 in. (90-120 cm)

6-9 in. (15-22 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Pale Yellow

Bloom Time:
Late Spring/Early Summer


Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

Click thumbnail
to view:

By hello85
Thumbnail #1 of Arabis glabra by hello85

By trilian15
Thumbnail #2 of Arabis glabra by trilian15


No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral Weezingreens On Nov 26, 2005, Weezingreens from Seward, AK (Zone 3b) wrote:

Arabis glabra is a wildflower plant, often called Tower Mustard. It is found in the United States in the northeast, and some of the plains states and as far south as Kentucky. It grows in open fields and woodland clearings, as well as along ledges... usually in dry soil.

It has an erect habit, with basal leaves resembling dandelion, but rougher, and pointed leaves surrounding the long, unbranched stems. Pale yellow blooms occur in the spring, turning to long upturned seed pods over the summer season.


This plant has been said to grow in the following regions:

Saint Helen, Michigan

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