Spring onion
Allium cepa · also called Green onion, hara pyaz
Vegetable or spice
- Light
- Sunny
- Pot size
- Medium pot (about 5 to 15 litres)
- Care level
- Moderate
- Year round or seasonal
- Seasonal crop for cool weather
- Pets
- ASPCA: toxic to pets
Light and position
Full sun: 6 or more hours of direct sun.
Size and pot
Oregon State suggests 10-inch pots for green onions. Our pot band: medium pot (about 5 to 15 litres).
Watering
Moist but well-drained soil; bulbs rot in soil that stays too wet.
Potting mix and feeding
Fertile, loose, well-drained mix.
Growing through the year
NC State describes onions as cool-season crops; both bulbs and green tops are eaten.
NC State’s vegetable handbook says cool-season vegetables thrive when temperatures fall below about 21 °C (70 °F), so grow it in your cooler months.
Watch for
Bulb mites; bulb rot in wet soil.
Pets and people
ASPCA lists onion as toxic to dogs, cats and horses (N-propyl disulfide). It can break down red blood cells (haemolytic anaemia); other signs include vomiting, weakness and a raised heart rate.
General gardening information, not professional advice. Plant toxicity details are a starting point, not veterinary or medical advice: if a pet or child may have eaten a plant, contact a veterinarian or doctor promptly.
Care level: NC State’s maintenance rating (Medium). Pot band and summary wording are ours, based on the sources below.