In general, an acre of land needs 3 to 5 kilograms of verbena seeds, and one kilogram can be planted 100- 150 square meters.

Pennisetum sibiricum is a Gramineae plant with membranous leaf sheath edge and ciliated sheath mouth. Ligule membranous, white. Bullwhip grass is distributed in North Africa, Europe and Mediterranean countries in Asia. In China, it is distributed in Northeast, North, Central, South and Southwest China. Most of them grow in wet places, such as fields, ditches and floodplains.