Annual Biennial
This plant is listed as an invasive non-native species in Great Britain – see Cultivation section for details An upright biennial with stout, ribbed stems, green basal leaves up to 20cm long, and shorter, bright, yellow-green upper leaves surrounding the stem. Open umbels of tiny, yellow-green flowers are produced in the second spring
Max Height
1-1.5 metres
Max Spread
0.5-1 metres