Picris rhagadioloides: complete guide

Overview

Picris rhagadioloides, commonly called oxtongue, tall ox-tongue or false hawksbeard, is an interesting wildflower from the Mediterranean region of Europe and the Middle East. This biennial plant grows naturally from central Europe to Mediterranean countries, from France to Turkey, and from North Africa through the Middle East.

This plant holds value for natural gardens and meadow conversions. With its yellow flowers and biennial growth pattern, it offers a transient but charming contribution to garden landscapes.

Appearance and bloom

Picris rhagadioloides is a herbaceous biennial forming a basal rosette with large, coarsely-toothed leaves in its first year. During the second year an upright flowering stem emerges reaching approximately 60-80 centimeters in height.

Tiny yellow flowers are grouped in flower heads (capitula), characteristic of the Asteraceae family. Each flowerhead contains numerous small florets. The blooming period extends from May through June.

Following bloom, seed heads form with feathery seed bristles (pappus) that facilitate seed dispersal via wind. The entire plant displays a rough-hairy appearance.

Ideal location

Picris rhagadioloides thrives in sunny locations with full sunlight. Part-shaded locations can work, but flower abundance becomes reduced.

The plant tolerates all European winter climates well. It grows from sea level to mountain regions, provided it has good drainage.

This plant is excellent for dry gardens and water-conserving planting schemes.

Soil

Picris rhagadioloides grows in virtually all soil types, provided drainage is good. Chalky, sandy or gravelly soils are actually preferred.

Poor, un-fertilized soil is actually better than very rich garden soil. This promotes more compact growth and better seed development.

Soil calcium content helps the plant thrive.

Watering

Once established Picris rhagadioloides tolerates drought exceptionally well. Young plants during their first season can benefit from regular watering.

In open ground rainwater usually suffices. In container cultivation more frequent watering may be necessary.

This plant can moreover endure very dry conditions, typical of Mediterranean summers.

Pruning

Pruning is unnecessary. Allow flowers to develop fully and form seeds for self-seeding. This creates natural plant renewal in subsequent years.

Remove only severely damaged leaves.

Maintenance calendar

Seasonal focus points:

• Spring: Direct sow seeds outdoors
• Summer: Let plants grow and flower
• Fall: Seeds ripen and drop
• Winter: Minimal care

Winter hardiness

Picris rhagadioloides is frost-hardy to -15 to -20 degrees Celsius. This means it is suitable for all Dutch, Belgian and German winter climates.

The plant tolerates winters well and returns the following spring from seed if self-seeding occurs.

Companion plants

This wildflower combines beautifully with other Mediterranean wildflowers and drought-tolerant plants. Other Asteraceae like Centaurea and Onopordum create lovely natural groupings.

It works well in meadow conversions and natural planting schemes.

Conclusion

Picris rhagadioloides is a valuable, easily-grown wildflower for natural gardens and dry planting schemes. With minimal care and only rainwater, this plant will provide years of yellow flowers and interesting needle-like seeds.

Discover Mediterranean wildflowers on gardenworld.app for more inspiration. Read about ecological garden design on gardenworld.app.