Aconitum columbianum is a PERENNIAL growing to 0.2 m (0ft 8in). It is in flower from July to August. The flowers are pollinated by Bees.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.
The whole plant is highly toxic – simple skin contact has caused numbness in some people. The roots and seeds are the most toxic and also the leaves just before the plant flowers.
![Smilacina [Maianthemum] racemosum (False Solomon's Seal) Seed Packet EO](https://www.gardenmaintenancetools.com/wp-content/uploads/2026/09/smilacina-maianthemum-racemosum-false-solomon-s-seal-seed-packet-eo.webp)