Photo by Melody

PlantFiles: Annual Bastard-Cabbage, Common Giant Mustard, Turnipweed
Rapistrum rugosum

Family: Brassicaceae (brass-ih-KAY-see-ee) (Info)
Genus: Rapistrum
Species: rugosum (roo-GO-sum) (Info)

Synonym:Myagrum rugosum
Synonym:Rapistrum rugosum subsp. orientale


12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

24-36 in. (60-90 cm)

Not Applicable

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Pale Yellow
Chartreuse (Yellow-Green)

Bloom Time:
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer


Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
Unknown - Tell us

Patent Information:

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

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By LindaTX8
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No positives
1 neutral
2 negatives

Gardeners' Notes:

Negative LindaTX8 On May 25, 2008, LindaTX8 from NE Medina Co., TX (Zone 8a) wrote:

Rapistrum rugosum has become an invasive introduced weed in many areas of the U.S. It is difficult to control and has resistance to some kinds of herbicide. It can successfully outcompete native plant species in natural areas such as open forests and along streams. It also establishes easily on agricultural fields, roadsides and disturbed lands.

Negative htop On May 2, 2007, htop from San Antonio, TX (Zone 8b) wrote:

Bastard cabbge also is commonly known as turnip weed, turnip-weed, common giant mustard, ball mustard, wild turnip, wild rape and tall mustard-weed. I love seeing this plant in bloom, especially in mass. However after reading how invasive it is, I have to give it a negative rating. It is on the Noxious Weeds List in Texas as well as other states.

Neutral frostweed On Jan 31, 2007, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Annual Bastardcabbage Rapistrum rugosom is Naturalized in Texas and other States.


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

Dallas, Texas
Fort Worth, Texas
San Antonio, Texas

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