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Pentanema salicinum

Pentanema salicinum · Asteraceae

The gardener's calendar

The right move for September

Ideal time to plant pentanema salicinum: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Common name
Willow-leaved inula
Family
Asteraceae
Type
Perennial herbaceous plant
Flowering
July to September
Adult size
60 to 100 cm in height
Foliage
Deciduous
Hardiness
Very hardy (down to -15°C)
Origin
Mediterranean basin and Western Asia

Care

Light exposure

Pentanema salicinum thrives in full sun or light partial shade. The sunniest exposure promotes abundant flowering and a compact shape. Position this plant where it receives at least 6 hours of direct light daily.

Soil

This inula prefers well-drained soil, rather dry to moderately moist, and tolerates chalky terrain. Avoid heavy soils or those that are constantly waterlogged, as these promote root rot. Ordinary garden soil, well loosened, works perfectly.

Watering

Water regularly during the first year after planting to establish a good root system. Once established, this perennial is very tolerant of drought and requires only occasional watering during prolonged heat waves. Reduce watering in winter.

Fertilizing

Pentanema salicinum requires only very modest fertilizing. A light application of compost or organic amendment in spring is sufficient. Excessive fertilization would promote lush foliage at the expense of flowering.

Pruning and cutting

Cut back the clump in late winter or early spring, before growth resumes, to 10-15 cm from the ground. This operation maintains a compact shape and encourages generous flowering. Remove spent flowers to extend the blooming period and overall appearance.

Diseases and pests

This plant is relatively robust and rarely affected by diseases or pests under normal conditions. Simply ensure good drainage to prevent fungal rot in overly humid conditions. Sufficient spacing between plants promotes air circulation.

Did you know?

Pentanema salicinum, formerly classified in the genus Inula, is a Mediterranean plant intimately linked to phytotherapy traditions. Its specific name 'salicinum' refers to its narrow, elongated leaves, reminiscent of those of the willow (Salix). This robust perennial historically inhabits the arid lands around the Mediterranean and remains a reliable choice for modern dry gardens.

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.