Stiff onion (Allium strictum)

Stiff onion

Allium strictum produces one or two bulbs, each up to 8 mm in diameter. Scape is up to 80 cm tall. Leaves are flat, narrow, shorter than the scape, about 4 mm wide. Umbels are spherical with many flowers crowded together. Tepals are rose-pink or reddish-purple with a dark purple midvein.

Scientific classification

Species

Stiff onion (Allium strictum)

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Perennial

Lifespan

Herb

Plant Type

Early summer, Mid summer

Harvest Time

25 cm to 80 cm

Plant Height

30 cm to 50 cm

Spread

White, Purple, Blue, Pink

Flower Color

Deciduous

Leaf type

Distribution of Stiff onion

Distribution Map

Stiff onion is naturally found across a broad swathe of the Eurasian continent, encompassing temperate regions from Eastern Europe to Central and East Asia. Over time, undisclosed human activities may have facilitated its presence in other non-native regions, making it a more widely recognized species. Its adaptability has allowed it to thrive across various climates within its extensive range.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Stony slopes, cliffs

Care Guide for Stiff onion

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Stiff onion prefers moderate moisture and well-drained soil, is moderately drought-tolerant, and benefits from weekly watering. Thriving in outdoor cultivation, it adapts to natural rainfall, making it suitable for low-maintenance perennial beds in temperate regions.

Pruning: Stiff onion features upright leaves and clustered blooms, flourishing with selective pruning. Dead or yellowing foliage should be pruned in early spring, while flower stalks should be trimmed post-bloom. Healthy leaves must remain intact, as they aid photosynthesis and promote regrowth.

Propagation: Stiff onion is ideal for ornamental gardens, propagated through healthy tubers. Plant in well-drained soil with ample sunlight for robust growth. Careful handling during planting ensures a stunning display of this plant's distinctive blossoms.

Repotting: Stiff onion requires excellent drainage in pots to thrive, ensuring optimal growth conditions and preventing waterlogging.

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