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Allium fistulosum, the Welsh onion, also commonly called bunching onion, long green onion, Japanese bunching onion, and spring onion, is a species of perennial plant, often considered to be a kind of scallion. The species is very similar in taste and odor to the related common onion, Allium cepa, and hybrids between the two (tree onions) exist.
Here's how to grow onions in your own garden, including growing onions from seed and growing from food scraps, and when to pick them in the spring.
A germinating scallion, 10 days old A close-up view of spring onions (note the larger bulbs) Species and cultivars that may be used as scallions include A. cepa 'White Lisbon' 'White Lisbon Winter Hardy' – an extra-hardy variety for overwintering; Calçot; A. cepa var. cepa – Most of the cultivars grown in the West as scallions belong to ...
Onion Seeds: seeds of the white onion that can be planted into sets in late Spring. While this method may have the longest grow time (up to 4 months for mature bulbs), the onions produced are the least susceptible to disease. [25] [26] [22] White onion seedling bulb soft and sprouting
Each stem produces an umbel inflorescence of 4–19 flowers during winter and spring. [7] The tepals are 10–18 mm (13 ⁄ 32 – 23 ⁄ 32 in) long and white, but with a "strong green line". [8] Each plant has two or three narrow, linear leaves, each up to 15 cm (6 in) long. [7] The leaves have a distinct onion smell when crushed.
White onions are mild in flavour; they have a golden colour when cooked and a particularly sweet flavour when sautéed. [30] [23] While the large, mature onion bulb is most often eaten, onions can be eaten at immature stages. Young plants may be harvested before bulbing occurs and used whole as spring onions or scallions. When an onion is ...