AKA ”Silver Ball” and “White Rocca.” A long day onion for the Northern States. This onion has a handsome globe-shaped bulb. It grows to a large size with pure white skin and flesh of mild flavor. Seedsman Thomas Griswold once wrote that this was the “best white onion for market,” and Southport is still one of the best white keepers available today. This Connecticut heirloom was named after the town of Southport and grown along Connecticut’s Mill River. Onions were exported by the millions from this agricultural epicenter also known as the “Onion Capital.” The Civil War increased the demand all the more because pickled onions were used to keep scurvy at bay. May be used to produce scallions, requiring only about 65 days.Amaryllidaceae Allium cepa
Southport White Globe
White onions are a dry onion with a pure white skin, and mild sweet taste. This onion is commonly used in Mexican cooking, and can be used fresh to provide a sweet and sour flavor, or used sauteed to a dark brown color.
- Ease of Growing
- Grown as
- Days to Maturity
- 80-120 (Spring/Summer), 210-240 (Fall/Winter)
- Growing Habit
Onions are very hardy and can be frost tolerant.
- Spring Transplant, Spring, Fall Transplant, Fall
- Growing Season
- Cultivar Type
- Growing Conditions
- Cold, Cool, Warm, Long days
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?
- Fruit Size
- Plant Height
- Plant Diameter
- Hardiness Zone
- Disease Resistance
- Taste Profile