This biennial swan plant is renowned for its ability to attract monarch butterflies, which love to lay their eggs on them. Wait 2-3 weeks for seedlings and 10 days for establihed plants to get established and any residual spray to disappear before putting any caterpillars on it. Then to be sure test it with one caterpillar first.
- Attracts butterflies
- Grows to a height of 2m
- Plant in full sun, in well-drained soil
- Plant 70cm apart