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Onion
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Allium cepa · Amaryllidaceae

Onion

✅ Pet-friendlyGrowing cycle of 90 to 120 days, depending on the variety.30 to 61 cm
Full sunMediumEasyResistant to temperatures down to -5 degrees Celsius.

Description & origin

The onion is a bulbous plant widely cultivated for its distinctive flavor. It is used in various cuisines around the world, being an essential ingredient in many dishes.

Size

Grows up to 30 to 61 cm tall, depending on the variety.

Foliage

Leaves are long and narrow, with a vibrant green color.

Flowering

Flowers are small and grouped in umbels, but are generally not grown for flowering.

Detailed care

Light

Prefers full sun but can tolerate partial shade in warmer climates.

Soil

Well-drained soil rich in organic matter, with a pH between 6 and 7.

Watering

Moderate watering, keeping the soil slightly moist but avoiding waterlogging.

Temperature

Prefers temperatures between 15 and 25 degrees Celsius, tolerating slightly cold.

Fertilising

Fertilize with a balanced fertilizer every 4 to 6 weeks during the growing season.

Repotting

Transplant when seedlings are about 10 cm tall.

Pruning

Does not require pruning, but it is important to remove weeds around.

Propagation

Easily propagated by seeds or bulbs.

Common problems

Aphid infestations

Aphids can infest the leaves, causing deformities and reduced growth.

Fungal diseases

Powdery mildew and other fungal diseases can affect the leaves, especially in high humidity conditions.

Rotting onions

Rotting can occur if onions are overwatered or if the soil does not drain well.

Uses & curiosities

In the garden

  • Ideal for home gardens
  • Attracts pollinators like bees
  • Can be grown in pots

Other uses

Used in cooking to enhance the flavor of dishes.

Did you know…

Onions are one of the oldest cultivated plants, with records dating back over 5000 years. There are several varieties, including white, yellow, and red onions.