Full-Size Onions
Onions receive their cue to start bulbing from day length, and to grow onion plants that form full-size bulbs by harvest time it is important to choose varieties adapted to the maximum growing season of day length in your region. Johnny's offers a selection of full-size onions varieties for each of the three day-length adaptations: long-day, intermediate-day, and short-day. Use our Full-Size Onion Comparison Chart to select the best varieties for your region, and to compare bulb size, color, shape, adaptability, storage potential, and other distinguishing characteristics.
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Yellow Granex
(F1) Onion Plants
Short-day for southern growers only, grown as Vidalia type in Georgia.
White Castle
(F1) Onion Seed
Short-day onion with excellent color and disease resistance.
Out Of Stock
Walla Walla Sweet
Organic Onion Seed
The famous juicy, sweet regional favorite from Walla Walla, Washington.
Out Of Stock
