Abstract
High tunnels can be used to grow winter alliums such as onions, garlic and leeks. Onions are diverse and include groups such as short-day and intermediate-day bulb onions as well as non-bulbing scallions or green onions. Onions can be diverse in color, size and shape. Short day onions are typically sweet onions which start bulbing when photoperiods reach 10-12 hours. Short-day onions are typically planted in November-December in the Deep South of the U.S. for spring harvest. Intermediate day onions start bulbing when the photoperiod is 12-14 hours. Intermediate day onions are planted in the spring in the Mid-Atlantic region. A high tunnel may provide a suitable microclimate for overwintering bulb onions for sale in mid Spring to early Summer. The objective of this evaluation was to examine high tunnel production of short- day and intermediate-day onions for commercial production in West Virginia.
Keywords
short-day onions, intermediate-day onions, high tunnel
DOI
10.5703/1288284318628
Date of this Version
5-2026
Recommended Citation
Jett, Lewis, "Evaluating Short-Day and Intermediate-Day Sweet Onions as Early-Season High Tunnel Onions in West Virginia" (2026). Midwest Vegetable Trial Reports. Paper 298.
http://dx.doi.org/10.5703/1288284318628