Tower rockcress is a tall, slim, grey-green wildflower with small creamy flowers at the top of its stems, usually a biennial that grows on poor chalky or sandy soils in open ground. It is grown mainly as a wildflower or cottage garden plant rather than a houseplant.
Family
Brassicaceae (Cabbage family)
Grows as
Perennial
Light
Full sun
Water
Water sparingly once established; it tolerates dry spells and dislikes waterlogged soil.
Soil
Poor, well-drained chalky or sandy soil.
Temperature
Hardy in cold temperate climates; tolerates frost well.
How easy
Easy
Native range
Temp. Northern Hemisphere to Trop. Mts.
Climate
temperate
About
Turritis glabra, commonly known as tower rockcress or tower mustard, is a tall, slim, grey-green plant with small creamy flowers at the top of the stem. It usually grows on poor chalky or sandy soils, in open situations. It is native to Europe, Asia, and North Africa, and it is widespread in North America where it is also probably native. It can be found in many other parts of the world as an introduced species.
Where it grows
The native distribution of tower mustard is moderately uncertain with sources having some details of its range different. POWO lists it as native to all parts of Europe with the exceptions of Ireland, Sardinia, and Corsica.
Text excerpted from the Wikipedia article Turritis glabra by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.