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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Walla Walla
Onion Plants
The famous juicy, sweet regional favorite from Walla Walla, Washington.
Out Of Stock
Yellow Granex
(F1) Onion Plants
Short-day for southern growers only, grown as Vidalia type in Georgia.
Out Of Stock
Ailsa Craig Exhibition
Onion Plants
A classic mild yellow onion with excellent size potential.
Out Of Stock
Sierra Blanca
(F1) Onion Plants
Big, mild white onions from a widely-adapted day-neutral variety.
Out Of Stock
Walla Walla Sweet
Organic Onion Seed
The famous juicy, sweet regional favorite from Walla Walla, Washington.
Out Of Stock