Dittrichia viscosa
Dittrichia viscosa · Asteraceae
The gardener's calendar
Ideal time to plant dittrichia viscosa: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Asteraceae
- Type
- Annual or biennial herb
- Adult height
- 30 to 80 cm
- Flowering
- July to September
- Foliage
- Deciduous, glandular and sticky
- Exposure
- Full sun
- Hardiness
- Mediterranean and warm temperate climate
- Origin
- Mediterranean, North Africa and Middle East
Care
Exposure
The sticky inula thrives in full sun, an essential condition for vigorous growth and abundant flowering. It handles very well hot and sunny exposures, typical of Mediterranean regions. Avoid partial shade which would slow down its development.
Soil and planting
This plant adapts to almost all soil types, even poor or chalky ones. However, it prefers quick drainage and tolerates drought very well once established. Plant it in autumn or spring in well-drained soil.
Watering
The sticky inula is very drought-resistant and requires only little water once established. During cultivation, water moderately when planting and during growth, then gradually reduce. Avoid excess moisture which would promote rot.
Fertiliser
This hardy plant does not require regular fertilisation. A moderate application of balanced fertiliser in spring is ample. In very poor soil, light organic amendment can boost vigour.
Pruning and maintenance
Light pruning after flowering promotes branching and a compact shape. Pinch young stems to encourage a bushy habit. Remove dead or diseased parts in spring.
Diseases and pests
The sticky inula is generally very resistant to diseases and pests. Excessive moisture can occasionally cause root rot. Watch for aphids in early season, controllable by water spray.
Did you know?
The sticky inula owes its name to the resinous and sticky substance that covers its leaves and stems, a remarkable adaptation that reduces water loss in arid environments and gives the plant a characteristic fragrance. This sticky property was once valued in traditional Mediterranean medicine for its purported anti-inflammatory virtues.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.