Tree onion - Allium proliferum

The 'Rocambole' Onion, also known as the Tree Onion or Egyptian Onion, is a variety that has the peculiarity of producing aerial bulblets. A very hardy perennial plant, the Rocambole Onion can remain in the vegetable garden for several years, making it ideal for permaculture. This ancient vegetable is grown for its shallots and its leaves, which can be consumed like chives. Plant it in spring, from March to May, or in autumn, in September - October.

Native to southern Europe and Egypt, the 'Rocambole' Onion, just like the 'Rocambole' Garlic, is recognised by its aerial bulblets that appear during the summer. Its leaves are long and hollow, with a bluish-green color. The stem has the peculiarity of bearing bulblets grouped in 1 to 2 layers at its top, initially green and then turning coppery red. If the bulblets are not harvested, the stems will dry out in autumn and bend down to the ground, allowing the bulblets to root in the soil. It is a perennial plant and very hardy, capable of remaining in the vegetable garden for several years (approximately 5 years).

In terms of cuisine, the Tree Onion has a similar flavour to shallots. The bulblets can be pickled in vinegar, while the finely chopped leaves add wonderful flavour to omelettes and fresh cheeses.

Harvesting: In summer, cut the stems carrying the aerial bulblets. The foliage is harvested while still green. The aerial bulblets can be harvested for culinary use or to renew the plants.

Storage: The foliage of the Egyptian Onion should be consumed quickly. The bulblets can be stored in a cool and dry place.

Gardener's tip: Plant some Tree Onion, not in the vegetable garden but in the garden as an ornamental plant, to add a touch of originality!