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Organic Allium 'Globemaster' (giant ornamental onion)

Organic Allium 'Globemaster' (giant ornamental onion)

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Organic giant onion 'Globemaster'

The Allium 'Globemaster' is one of the most popular species within the Allium family, thanks to its impressive spherical flowers. With its compact ball-shaped flowers that can grow up to 25 centimeters in diameter, it is also called the giant onion. These flowers grow on powerful stems that can reach a height of about 80 centimeters. It is striking that the stems are so sturdy that it sometimes appears as if two stems have grown together, making the plant extra robust and even able to withstand strong winds and storms.

Dried flowers

The ball-shaped flower is formed by more than 1,500 purple small star-shaped flowers that bloom one after the other and receive many visits from insects such as bees and bumblebees. They bloom for 5 to 6 weeks from the end of May until July. The flower must grow completely so that the small flower stalks develop properly and thus become somewhat harder, so that the flower does not collapse during drying. The flower is cut and dried just before it has finished blooming, approximately the first week of July. Hang them upside down in a dark and well-ventilated area. The color does not become paler in a dark room, but it does in the sun. When they are thoroughly dry, the decorative seeds also become visible.

You can also let it dry out in the garden without cutting the flower stem, but the flower will then completely lose its color.

How, where and when do I plant an Allium 'Globemaster' flowerbulb?

From October to January, the flowerbulbs are planted about 20 centimeters deep in the ground. It is best to maintain 10 centimeters of soil above the flowerbulb and at least 25 centimeters apart for planting distance. Give them organic food when planting and again in February or March. Plant it in full sun or partial shade in a nutrient-rich, water-permeable, preferably calcareous, sandy soil. It is important that you loosen the soil thoroughly, possibly with sand, before planting the flowerbulb in it.

Care of the allium

The flowers of the Allium 'Globemaster' bloom late in the spring. The spent flower looks very nice as a dried flower for decoration in the garden or in a dry vase in the room. After flowering, the flowerbulbs are best removed from the ground, dried and stored in a dry, warm place in the shed (if necessary, hang the flowerbulb in a net so that the mice cannot reach it.) and then replanted from October. to become.

The flower bulbs can also be left in the ground in the summer after flowering, but the flowers will then become noticeably smaller the following year. This is because the flower bulbs multiply underground and then remain against each other. The roots of the flowerbulbs can develop better if they are planted separately and will then produce large flowers.


The flowerbulbs multiply every year. Split these apart and plant them at least 30 centimeters apart, replanting them in the autumn. Also give them some organic fertilizer or other food. This way you will have more flowers every year and you will enjoy these beautiful eye-catchers for years to come!

Origin and history

In 1959, the dutch bulbgrower Jan Bijl crossed the two species Allium albopilosum 'Christophii' and Allium 'Macleanii' with each other, resulting in the fantastic giant onion Allium 'Globemaster'. The Valkering brothers from Egmond ensured that this novelty was grown on a large scale and acquired its world famous status.

Organic Allium 'Globemaster', Skal NL-BIO-01 certified: 109459

Packaged individually or choose more for less in the form of a stacking discount!

Can be ordered from June '24!

Shipping €5.95 - Free shipping from €35 purchase.



Flowering time: May - June
Planting time: From October
Planting depth: 20 cm deep
Planting distance: 25 cm apart
Height: 80 cm high
Flower diameter: 25 cm wide
Location: Partial shade, sun
Soil PH: Loam, sandy soil - Slightly alkaline/neutral
Winter hardiness: Very hardy
Propagation: Good
Family: Alliaceae (garlic family)
Colour: Purple
Bulb size: 18+

Other allium species:

  • Bio Allium 'Cowanii'
  • Bio Allium 'Mount Everest'
  • Bio Allium 'Purple Sensation'
  • Bio Allium 'Red Giant Star'
  • Bio Allium 'Schubertii'
  • Bio Allium 'Sphaerocephalon'
  • Bio Allium 'Tuberosum' (Garlic Chives)
  • Bio Allium 'Violet Beauty'
  • Bio Allium albopilosum 'Christophii'
  • Bio Allium ampeloprasum 'Ping Pong'
  • Bio Allium caeruleum 'Azureum'
  • Bio Allium moly 'Jeannine'
  • Bio Nectaroscordum siculum 'Bulgaricum'


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