Tree wormwood
Artemisia arborescens · Asteraceae
📷 H Brisse (upload by Abalg) · CC BY-SA 3.0
The gardener's calendar
Tree wormwood is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Foliage
- Evergreen, finely cut, silvery
- Flowering
- August to September, small yellow flowers
- Adult size
- Approximately 150 cm in height
- Growth
- Fast
- Hardiness
- Moderate, between −5 and −10 °C depending on varieties
- Origin
- Mediterranean basin, notably coastal regions
- Soil type
- Well-drained, light, poor to average
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Tree Wormwood becomes straggly and bare at the base after 3-4 years: cut back hard in March (to 20-30 cm) to rejuvenate. On compacted or heavy soil, it suffocates: loosen and improve drainage from planting onwards.
The common mistake
Letting it grow without pruning—it becomes a hollow, open plant that collapses in the first storm.
The pro's trick
Take semi-herbaceous cuttings in May-June under a cold frame to easily refresh your planting.
Care
Exposure
Tree Wormwood demands full sun to thrive and develop its beautiful silvery foliage. Plant it in a sunny location for at least 6 hours per day. Insufficient exposure promotes leggy growth and reduces the density of the shrub.
Watering
Very economical with water, this Mediterranean plant tolerates prolonged drought perfectly once established. Water moderately during the first year, then gradually reduce watering. In humid regions, favour spaced-out watering to avoid stagnant moisture at the roots.
Soil
Well-drained soil is essential: Wormwood fears waterlogging. Prefer light and even poor substrate, enriched with gravel or sand. Avoid heavy or excessively chalky soils, which can slow its growth.
Pruning and maintenance
Prune lightly in late winter or spring to maintain a compact, bushy shape. Remove dead wood or growth damaged by frost. Severe pruning can weaken the plant; prefer regular and moderate interventions to preserve its natural silhouette.
Fertilizer
Wormwood is satisfied with poor soil and requires only minimal fertilizer. A light organic amendment in spring is more than enough. Avoid excess nitrogen, which would promote soft growth at the expense of robustness.
Diseases and pests
Rarely sensitive to pests, this hardy plant mainly fears excessive moisture, which causes root rot or rust. Ensure excellent drainage and good air circulation. In Mediterranean or dry climates, it remains very healthy.
Did you know?
Tree Wormwood is traditionally used in Mediterranean regions for its aromatic properties and was once burned as incense. Its finely cut and silvery foliage makes it an ornamental plant appreciated for dry gardens, while its fragrant essence has long been exploited in natural perfumery and herbalism.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- SunflowerHelianthus annuus
- YarrowAchillea millefolium
- Ox-eye daisyLeucanthemum vulgare
- SneezewortAchillea ptarmica
- Canadian goldenrodSolidago canadensis
- WormwoodArtemisia absinthium
Tips generated and checked by Viridia — adapt them to your local climate.