Allium giganteum · Amaryllidaceae

Giant Onion

⚠️ Not safe for petsPerennial life cycle, returning to sprout annually.90 to 120 cm

LightFull sun

WaterMedium, allowing the soil to dry between waterings

DifficultyMedium

ColdResistant down to -10 degrees Celsius.

Full sunMedium, allowing the soil to dry between wateringsMediumResistant down to -10 degrees Celsius.

Description & origin

The Giant Onion is a bulbous plant known for its spherical and impressive flowers. Its inflorescences can reach up to 15 cm in diameter, creating a spectacular visual effect in the garden.

Size

Can reach heights between 90 to 120 cm.

Foliage

Leaves are long and narrow, displaying a deep green.

Flowering

Blooms in late spring and early summer.

Detailed care

Light

Prefers full sun locations but can tolerate partial shade.

Soil

Well-drained soil rich in organic matter.

Watering

Moderate watering, allowing the soil to dry between waterings.

Temperature

Resistant to low temperatures, but protect from severe frosts.

Fertilising

Fertilize in spring with a balanced fertilizer.

Repotting

Transplant in autumn or spring, ensuring bulbs are healthy.

Pruning

Remove wilted flowers to promote healthy growth.

Propagation

Propagates by dividing bulbs in autumn or spring.

Common problems

Bulb rot

Can occur if the soil is overly saturated.

Insect pests

May be affected by aphids and mites.

Fungal diseases

Sensitive to fungi if humidity conditions are high.

Uses & curiosities

In the garden

Ideal for flower beds
Great for borders
Attracts pollinators like bees and butterflies

Other uses

Used in floral arrangements due to its height and beauty.

Did you know…

This plant is often used in floral arrangements due to its height and beauty. It is also an excellent option for attracting pollinators.