Sticky hawkweed: complete guide

Overview

The Sticky Hawkweed (Hieracium amplexicaule), also known as the clasping-leaf hawkweed, is a mountain plant from the Asteraceae family, distributed across Central and Southern Europe and North Africa. This characteristic alpine plant grows on rocks and stony slopes and reaches modest heights to 50-60 cm.

Appearance and bloom

Hieracium amplexicaule forms loosely dense rosettes of oblong, clasping leaves (amplexicaule means embracing stem). Yellow flowers appear in terminal cymes with characteristic black hairs on seeds. Each flower reaches approximately 1.5-2 cm diameter, appearing during June and July.

Ideal location

This mountain plant thrives best on open, sunny locations with minimum 6 hours direct sunlight daily. In the Alps, it grows on south-facing mountain slopes. In gardens, position where unlimited sunny exposure combines with wind protection.

Soil requirements

Sticky Hawkweed proves highly flexible and grows well in lean soils. Optimal mix: 50% sand/grit, 30% peat moss, 20% rock fragments. pH 6.5-7.5. In containers use alpine mix with extra minerals. Plant shows little soil discrimination and thrives in lean ground.

Watering regime

Once established, highly drought-tolerant. Water only during extreme dry periods in growth season. In containers maintain moderate regular watering. Avoid waterlogging. Winter moisture extremely minimal.

Pruning

Minimal pruning required. Remove yellowed leaves or damaged parts. Seed heads can be removed for neater appearance or retained for self-seeding. No aggressive cutting needed.

Maintenance calendar

April: Check for pests. May-June: Regular watering. June-July: Bloom, minimal intervention. August: Allow seed ripening. September-March: Minimal care.

Winter hardiness

Hieracium amplexicaule proves hardy to approximately -15°C when established. In extreme winter conditions protect with dry mulch layer. Plant shows considerable resilience to extreme weather.

Companion plants

Pairs well with: Sempervivum species, low-growing alpines, Saxifraga species. All share preference for lean, well-draining soils and sunny positions.

Final thoughts

The Sticky Hawkweed belongs among robust mountain plants requiring minimal maintenance. Thanks to drought tolerance and winter hardiness, it forms a resilient element in alpine gardens. Available at specialty garden centers across Europe.

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