Where does the Allium come from?
The genus Allium probably includes more than 1,000 species and cultivars. This plant is naturally spread across the Northern Hemisphere and is common in Central Asia, the countries around the Mediterranean and western North America. Allium grows mainly in these areas because of the favourable climate and soil conditions. However, we also find some wild Allium species in the Netherlands, such as the sage garlic (Allium sativum).
From small bulbs to large ornamental onions
The diversity in the Allium genus is truly astonishing. Many original and cultivated species have a bulbous base that varies from small (about 3 cm) to large sizes of up to 40 cm. These bulbs store nutrients and ensure a long flowering period, which makes the Allium ideal for use in the garden. In addition, there are species with a thickened root base, also called a 'shaft', which are also suitable for naturalisation and long-lasting flowering.
Small and large bulbous Allium
Alliums can be roughly divided into two main groups: small bulbous and large bulbous Alliums. Smaller Alliums and varieties with thickened roots are very suitable for naturalisation and grow well in a natural environment. Larger species, such as the giant onion (Allium giganteum), can remain in the ground for several years, although the flowering quality may decrease over time. These larger bulbs will last the longest in permeable sandy soil.
Care and maintenance of Allium bulbs
Caring for Allium bulbs is relatively simple, but there are a few important points to consider. If you notice that the flowers are getting smaller over the years, you may want to consider removing the bulbs from the ground after flowering. To preserve them, it is important to store them at a temperature of around 23-25 degrees Celsius. This prevents them from drying out and ensures that the bulbs retain their vitality. Replant the bulbs in November, preferably in a different location, to prevent diseases.
Tips for planting Allium
Alliums like a sunny location and well-drained soil. It is advisable to plant the bulbs in the autumn, so that they can flower in the spring or early summer. For long-lasting flowering and a stronger plant, it is advisable to plant the bulbs a few centimetres deep. For large-bulb Alliums such as ornamental onions, a planting depth of around 10-15 cm is ideal.
Frequently asked questions about Allium
Can Alliums survive in the Netherlands?
Yes, many Allium species do very well in the Dutch climate. Wild varieties such as sage garlic can adapt well to local conditions.
How often should I move my Alliums?
Most large-bulb-shaped Alliums can remain standing for several years. However, if flowering decreases, it is advisable to plant the bulbs in a different location.
Buy Alliums online at Nijssenbulbs
Allium is a versatile plant that is incredibly popular, which, thanks to its various colours, shapes and sizes, is an enrichment for any garden. With the right care, these plants can flower for years and provide a beautiful spectacle of colours.
Would you like to order Alliums online at Nijssenbulbs? Take a look at our extensive range. If you would like help or advice with this, please contact us without obligation by calling or emailing.
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