What is Onion plant?
Onion is an Allium species grown for its layered bulb formed from thickened leaf bases.
Structure and life cycle
Form and cycle: Fine roots emerge below the bulb, and tubular leaves grow above it. Day length, cultivar and temperature influence bulb formation; varieties perform differently across latitudes. Flowering usually occurs in the second year, producing spherical flower heads. Volatile compounds released during cutting can irritate eyes.
Growth, uses and cautions
Growing and storage: Drainage and weed control aid growth. Mature dry bulbs can be stored under suitable conditions, while green onions are harvested earlier. Onion and garlic are related but distinct species. Onion can be toxic to dogs and cats.
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