Cipollini onions are small to mid size with flat tops and bottoms. The sweet onions are low in sulfur and have more residual sugar in white and yellow storage onions. They are best known for their roasting characteristics because of their sweetness in flavor. They also have thin skins and so don't store very well.
- Ease of Growing
- Grown as
- Days to Maturity
- 70-95 (Spring/Summer), 190-220 (Fall/Winter)
- Growing Habit
Onions are very hardy and can be frost tolerant.
- Spring Transplant, Spring, Fall Transplant, Fall
- Growing Season
- Cultivar Type
- Extra Early
- Growing Conditions
- Cold, Cool, Warm
Correct timing is important with bulb onions, if you don't plant them at the right time they won't do very well. The best onions are grown from transplants set out in October or November and wintered over to mature in June and July. Plant transplants right away, if possible. Transplants are happy if you apply a light mulch to help conserve moisture for uniform growth.
- Outdoor Growing Temp
- 55°F - 80°F
- Min Outdoor Soil Temp
Onion seed takes a month to germinate at 40 degrees, but only 2 weeks at 50 degrees, so you don't necessarily lose much time by waiting until the soil has warmed up a little.
- Start Indoors
- Start Outdoors
Onions are quite drought tolerant, but a lack of water makes the bulb smaller and more pungent. For best flavor and largest bulbs you must keep the soil moist at all times, so there is no interruption in growth.
Low nitrogen. Moderate potassium. Moderate phosphorous.
Onions don't need a lot of nitrogen, but they do like potassium and phosphorus.
- Drought tolerant, Tolerates light frost
- Small Gardens?
Onions can be grown easily in containers. Make sure they have good drainage and the pot is at least 12" deep. Fill with a mixture of potting soil and compost, and water thoroughly. Make sure that your onions have access to plenty of sunshine. Keep the soil moist.
- Attracts beneficial insects?
- Golden yellow
- Fruit Size
- Plant Height
- Plant Diameter
- Hardiness Zone
- Disease Resistance
- Taste Profile
High sugar content, great for roasting, or sauteing. Popular with chefs.