What is the difference between short day onions and day neutral onions? – Seeds 'n Such

Short day onions and day neutral onions are two types of onions that differ in their photoperiodism, which is the length of time that a plant is exposed to light in a day.

Short day onions, also known as southern onions, are onions that require a shorter period of daylight, typically around 10-12 hours, in order to initiate bulb development and flowering. These onions are commonly grown in the southern United States and are well suited to areas with a long growing season and a relatively warm climate.

Some common varieties of short day onions include:

Texas Grano: This is a yellow onion that is well suited to the southern United States and has a strong, pungent flavor.
Yellow Granex: This is a yellow onion that is widely grown in the southern United States and has a sweet, mild flavor.
White Granex: This is a white onion that is widely grown in the southern United States and has a sweet, mild flavor.
Vidalia: This is a sweet onion that is grown in the Vidalia region of Georgia and has a mild, sweet flavor.
1015Y: This is a yellow onion that is specifically developed for the southern United States and has a sweet, mild flavor.
Red Grano: This is a red onion that is well suited to the southern United States and has a strong, pungent flavor.

Short day onions are well suited to areas with a long growing season and a relatively warm climate, and are commonly used in a variety of culinary applications, including salads, grilling, roasting, and sautéing. They can also be stored for later use.

Day neutral onions, on the other hand, are onions that are not influenced by the length of the day and can initiate bulb development and flowering at any time. These onions are well suited to areas with a shorter growing season or a cooler climate, as they can be grown in a wider range of conditions. Some common varieties of day neutral onions include:

Red Wing: This is a red onion that is well suited to cooler climates and has a strong, pungent flavor.
Walla Walla: This is a sweet onion that is well suited to cooler climates and has a mild, sweet flavor.
Candy: This is a sweet onion that is well suited to cooler climates and has a mild, sweet flavor.
Copra: This is a yellow onion that is well suited to cooler climates and has a strong, pungent flavor.
Yellow Globe: This is a yellow onion that is well suited to cooler climates and has a strong, pungent flavor.
White Sweet Spanish: This is a white onion that is well suited to cooler climates and has a mild, sweet flavor.

Day neutral onions are well suited to areas with a shorter growing season or a cooler climate, and are commonly used in a variety of culinary applications, including salads, grilling, roasting, and sautéing. They can also be stored for later use.

In general, short day onions are more commonly grown in the southern United States, while day neutral onions are more commonly grown in the northern United States and other parts of the world. Both types of onions can be used in a variety of culinary applications and can be stored for later use.