Barbarea, also known as 'wild cress', can be biennials or perennials, with simple or pinnate leaves and small, 4-petalled yellow or white flowers, followed by slender seed-pods
This miniature with its purple-grey foliage is ideal for container planting. The bright yellow flowers all have a tiny red eye and appear in spring. Height 30 cm. Spread 40 cm.
An evergreen addition for the rockery, front of border or walls. Single yellow flowers with orange eye against silver-green foliage in early summer. Second flush in late summer. Height 20 cm. Spread 40 cm.
If you want to add a touch of grey to your rockery this is a good choice. The pale yellow flowers have darker yellow centres and appear from Spring. Height 20 cm. Spread 40 cm.