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.
48 Products
Sort By:
Sort By:
Sierra Blanca
Pelleted (F1) Onion Seed
Big, mild white onions from a widely-adapted day-neutral variety.
Rossa di Milano
Organic Pelleted Onion Seed
Our superior strain of this classic, long-day Italian OP.
Ailsa Craig Exhibition
Onion Seed
A classic mild yellow onion with excellent size potential.
Out Of Stock
Yellow Granex
(F1) Onion Plants
Short-day for southern growers only, grown as Vidalia type in Georgia.
Out Of Stock
Walla Walla
Onion Plants
The famous juicy, sweet regional favorite from Walla Walla, Washington.
Out Of Stock
Walla Walla Sweet
Organic Onion Seed
The famous juicy, sweet regional favorite from Walla Walla, Washington.
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
