Growth Habit: An erect plant which can reach a height of 2.75m but normally averages 1-1.5m. Hemlock has hollow, pale green stems with purplish patches. The plant also has large, pale green leaves, similar to carrot leaves.
Type of Plant: Hemlock can be an annual or biennial.
Flowers: Broad flower heads are produced in summer, which comprise hundreds of tiny white flowers.
Fruit/Seed: Thousands of tiny seeds are produced in autumn.
Dispersal: Reproduces by seed, and from fragments of the root system if disturbed, such as by earthmoving equipment.
Distribution: Hemlock can be usually found on disturbed ground or in damp areas. It is also common on roadsides.
Status: Secondary in Tasmania.
- All parts of the plant are poisonous to both humans and livestock. This is due to the presence of 5 alkaloids, coniceine and coniine being the most active.
- The plant is toxic either green or dried in hay.
- Rarely causes significant economic losses to crops.
For further information contact the Department of Primary Industry, Water and Environment, Tasmania.
- Grubbing (all year). Isolated plants may be manually removed with a fork or similar tool. Wear gloves as this plant has poisonous properties.
- Herbicide (spring, summer). Herbicides registered in Tasmania include 2,4-D, triclopyr, MCPA + glyphosate. BE WARNED: As herbicide treated plants are attractive to stock, they must be kept away till plant completely disintegrates.
N.B. Always check the herbicide label before use.