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PlantSnap
Plant Care
Onion
(Allium cepa)
Also Known As
Onion, Bulb onion, Common onion, Brown onion, Yellow onion, Red onion, White onion
About This Plant
Allium cepa is a bulbous plant species in the genus Allium. It is widely cultivated as a vegetable and is known for its pungent taste and aroma.
Plant Care Instructions
Outdoor Size Range
Height: 12-24 inches (30-60 cm), Width: 6-8 inches (15-20 cm)
Light Requirements
Onions require full sun, which means at least six hours of direct sunlight per day.
Humidity Needs
Onions prefer low humidity environments, around 40-60%.
Fertilizing Schedule
Onions require a balanced fertilizer with a higher nitrogen content during the early growing stages.
Pruning Guidelines
Onions do not require pruning, but removing any flower stalks that appear can help the plant focus its energy on bulb growth.
Common Pests and Diseases
Common pests and diseases for onions include onion maggots, thrips, and downy mildew.
Indoor Size Range
N/A
Watering Schedule
Onions need consistent watering, about 1 inch (2.5 cm) of water per week, but they don't like to sit in standing water.
Temperature Range
Onions prefer cool weather, with temperatures between 60-75°F (15-24°C) during the day and 50-65°F (10-18°C) at night.
Growing Season
Onions are a cool-season crop and are typically planted in the spring or fall.
Growing Difficulty Level
Easy to grow
USDA Hardiness Zones
3-9
Did You Know?
Onions have been cultivated for over 5,000 years and were used by the ancient Egyptians as a symbol of eternity due to their spherical shape and concentric rings.
