Seeds - Wormwood

2026-04-28T01:02:54-03:00

Wormwood (Artemisia absinthium) is a robust and remarkable perennial plant, now best known as a key ingredient in absinthe and vermouth. Its finely cut, silver-grey foliage and upright habit make it a very decorative plant, suitable for both herb gardens and ornamental beds. Traditionally, it was used for its medicinal properties as a bitter tonic stimulating appetite and supporting digestive, hepatic, and gallbladder functions. At higher concentrations, it was also used as a dewormer, sedative, and psychoactive substance. Its strong aroma also makes it a useful companion plant for repelling certain pests. Caution: Wormwood contains thujone and should be used with prudence and under the supervision of a qualified phytotherapy professional.

Where to Grow Wormwood?
This plant is suitable for zones 3 to 9. It prefers full sun and dry, sandy, or very well-drained soil. Once established, it is drought-tolerant and adapts to poor or exposed soils.

History and Traditional Uses
Wormwood (Artemisia absinthium) has a long history in traditional medicines and popular cultures of Europe and Asia. Its bitter compounds have been used for centuries in tonics and liqueurs, and it is particularly associated with the absinthe culture of the 19th century. In traditional medicine, it was used against parasites, digestive disorders, and melancholy. Due to its powerful chemical composition, notably the presence of thujone, its use must remain cautious and informed.

Information for Canadian Zones
Zones 8-9: Sow directly in early spring or fall; hardy perennial.
Zones 5-7: Start indoors 6 to 8 weeks before the last frost and transplant outdoors.
Zones 3-4: Protect in winter by heavy mulching or bringing the plant indoors.

How to Grow and Harvest Wormwood

Planting: Sow seeds on the surface in early spring; press them lightly into the soil without covering them.
Watering: Water regularly until the plant is established, then reduce frequency.

Harvesting: Harvest aerial parts before flowering for a higher concentration of active ingredients.

Maintenance: Prune in late summer to encourage more compact growth and limit the plant's spread.

Tips for Harvesting Seeds for Future Supply

Selecting Mature Plants: Allow some flower heads to dry completely on the plant.
Harvesting and Cleaning: Cut or shake the dry heads, then sift to collect the seeds.
Drying and Storage: Dry seeds completely in the air before storing them.
Viability: Seeds remain viable for 3 to 4 years if stored in a cool, dry place.