Persian onion (Allium hollandicum)

Persian onion

Allium hollandicum is a bulb-forming perennial with scapes up to 90 cm tall. It has long, flat, strap-shaped leaves up to 60 cm long. Umbels are large and spherical, up to 25 cm in diameter, with many purple to reddish-purple flowers.

Scientific classification

Species

Persian onion (Allium hollandicum)

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Perennial

Lifespan

15 cm to 23 cm

Spread

Green

Leaf Color

Pink, Purple

Flower Color

Green, Pink

Stem Color

Deciduous

Leaf type

5 - 32 ℃

Ideal Temperature

Spring, Summer

Growth Season

Moderate

Growth Rate

Images of Persian onion

Distribution of Persian onion

Distribution Map

Persian onion is native to the Middle Eastern region, particularly in areas corresponding with ancient Persia. The species has been introduced and is now found in the cultivated state across parts of Northern and Central Europe. Despite its name, persian onion's extended range does not reflect a natural dispersal, but rather a result of intentional cultivation and popularity as an ornamental plant.

Native

Cultivated

Invasive

Introduced

No species reported

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Cultivars

There are several recognized cultivars of Persian onion, including the following common varieties :

Persian onion 'Purple Sensation'Onions 'Purple Sensation'

Quickly Identify Persian onion

Opulent violet-hued inflorescences with star-shaped flowers

Basal rosette of strap-like green leaves, up to 2 feet (60 cm) long

Robust, smooth green stem standing about 2 feet (60 cm) tall

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Care Guide for Persian onion

Every 1-2 weeks

Water

Full sun

Sunlight

5 - 32 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Persian onion thrives in dry, sunny regions and requires infrequent watering, about once every 1-2 weeks. Preferring well-draining soil, it mimics its native arid conditions, making it ideal for low-maintenance outdoor growth.

Fertilize: Fertilize persian onion with balanced fertilizers three times during the growing season for optimal growth and blooms. Begin in spring, then every 4-6 weeks until late summer. Avoid over-fertilization and adjust based on soil fertility. Yearly application of nutrients is vital for persian onion's health and blooms.

Pruning: Prune persian onion in early spring by removing dead foliage to foster growth and prevent disease. Trim spent flowers in late spring for reblooming. Heavy pruning can hinder blooming; proper pruning improves air circulation and reduces fungi. Use sharp, clean tools for optimal cuts.

Propagation: Persian onion is valued for its spherical blooms and is typically propagated through division. Once foliage withers, bulblets should be separated from the parent bulb to prevent overcrowding. Plant them in well-draining soil with sufficient spacing, and provide regular watering and good lighting for optimal growth.

Repotting: Persian onion requires excellent drainage when grown in pots to prevent root rot and promote healthy growth.

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