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

54 Products

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Safrane Full-Size Onions

Safrane

(F1) Onion Seed

A hard yellow storage onion for the main season.

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Patterson Onion Plants & Sets

Patterson

(F1) Onion Plants

Extremely long-storage yellow onion.

Cabernet Full-Size Onions

Cabernet

Pelleted (F1) Onion Seed

Early yields of red onions without sacrificing size.

Walla Walla Onion Plants & Sets

Walla Walla

Onion Plants

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

Blush Plants Full-Size Onions

Blush Plants

(F1) Onion Plants

Unique pink specialty onion.

Yellow Granex Onion Plants & Sets

Yellow Granex

(F1) Onion Plants

Short-day for southern growers only, grown as Vidalia type in Georgia.

Ailsa Craig Exhibition Onion Plants & Sets

Ailsa Craig Exhibition

Onion Plants

A classic mild yellow onion with excellent size potential.

Sierra Blanca Onion Plants & Sets

AAS (All-America Selections) Winners

Sierra Blanca

(F1) Onion Plants

Big, mild white onions from a widely-adapted day-neutral variety.

Redwing Onion Plants & Sets

Redwing

(F1) Onion Plants

Reliable long-storage red.

Out Of Stock

White Castle Full-Size Onions

White Castle

(F1) Onion Seed

Short-day onion with excellent color and disease resistance.

Out Of Stock

Expression Full-Size Onions

Expression

(F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Out Of Stock