Full-Size Onion Seeds & Plants | Johnny's Selected Seeds

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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.

Full-Size Onion Varieties | Comparison Chart (PDF)

Map of Long-Day, Intermediate-Day & Short-Day Onions

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Red Rock Full-Size Onions

Red Rock

(F1) Onion Seed

The best red onion for southern growers.

Cabernet Full-Size Onions

Cabernet

(F1) Onion Seed

Early yields of red onions without sacrificing size.

Out Of Stock

Walla Walla Sweet Full-Size Onions

Walla Walla Sweet

Organic Onion Seed

The famous juicy, sweet regional favorite from Walla Walla, Washington.

Out Of Stock

Cabernet Full-Size Onions

Cabernet

Pelleted (F1) Onion Seed

Early yields of red onions without sacrificing size.

Out Of Stock