Diplotaxis tenuifolia is a species of flowering plant in the mustard family known by the common name perennial wall-rocket.

S. tenuifolium is a junior synonym of Diplotaxis tenuifolia (Perennial Wall-rocket).

It usually feeds on crucifers: both cultivated brassicas and wild species such as flixweed, garlic mustard, perennial wall-rocket, wallflower and wild radish.

Your new friend is Diplotaxis tenuifolia, also known as D. erucoides.

Diplotaxis tenuifolia (I)

The site also sounds ideal for perennial wall rocket, a k a wild arugula (Diplotaxis tenuifolia), which tastes a lot like arugula but hotter and sweeter.