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

51 Products

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Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Onion Seed

Our superior strain of this classic, long-day Italian OP.

Calibra Full-Size Onions

Calibra

Organic (F1) Onion Seed

Storage onion for intermediate latitudes.

Redwing Full-Size Onions

Redwing

(F1) Onion Seed

Reliable long-storage red.

White Castle Full-Size Onions

White Castle

(F1) Onion Seed

Short-day onion with excellent color and disease resistance.

Patterson Full-Size Onions

Patterson

Pelleted (F1) Onion Seed

Exceptionally long-storing yellow onion.

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Expression Full-Size Onions

Expression

(F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted Onion Seed

Our superior strain of this classic, long-day Italian OP.

Sierra Blanca Full-Size Onions

AAS (All-America Selections) Winners

Sierra Blanca

Pelleted (F1) Onion Seed

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

Red Carpet Full-Size Onions

Red Carpet

Organic (F1) Onion Seed

Vibrant red, long-day storage onion.

White Ace Full-Size Onions

White Ace

(F1) Onion Seed

Our recommended substitute for White Castle.

Barolo Full-Size Onions

Barolo

(F1) Onion Seed

An earlier red storage type.

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Onion Seed

A classic mild yellow onion with excellent size potential.

Talon Full-Size Onions

Talon

Organic (F1) Onion Seed

Organic long-day storage onion.

Blush Full-Size Onions

Blush

(F1) Onion Seed

Unique pink specialty onion with excellent storage potential.

Safrane Full-Size Onions

Safrane

(F1) Onion Seed

A hard yellow storage onion for the main season.

Red Carpet Full-Size Onions

Red Carpet

Organic Pelleted (F1) Onion Seed

Vibrant red, long-day storage onion.

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Pelleted Onion Seed

A classic mild yellow onion with excellent size potential.

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Frontier Full-Size Onions

Frontier

(F1) Onion Seed

Downy mildew resistance for a wider range of latitudes.

Redwing Full-Size Onions

Redwing

Pelleted (F1) Onion Seed

Reliable long-storage red.

Cabernet Full-Size Onions

Cabernet

(F1) Onion Seed

Early yields of red onions without sacrificing size.

Talon Full-Size Onions

Talon

Organic Pelleted (F1) Onion Seed

Organic long-day storage onion.

Sale

Scout Full-Size Onions

Scout

(F1) Onion Seed

Early, adaptable intermediate-day Spanish type with disease resistance.

Sale

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

Red Rock Full-Size Onions

Red Rock

(F1) Onion Seed

The best red onion for southern growers.

Expression Full-Size Onions

Expression

Pelleted (F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Out Of Stock

Bridger Full-Size Onions

Bridger

(F1) Onion Seed

First-early onions from seed.

Out Of Stock

Yellow Granex Onion Plants & Sets

Yellow Granex

(F1) Onion Plants

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

Out Of Stock

Patterson Onion Plants & Sets

Patterson

(F1) Onion Plants

Extremely long-storage yellow onion.

Out Of Stock

Bridger Full-Size Onions

Bridger

Pelleted (F1) Onion Seed

The best onion for overwintering in the North.

Out Of Stock

Candy Onion Plants & Sets

Candy

(F1) Onion Plants

Widely adapted Walla Walla type for growing farther South.

Out Of Stock

Walla Walla Onion Plants & Sets

Walla Walla

Onion Plants

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

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

Ailsa Craig Exhibition Onion Plants & Sets

Ailsa Craig Exhibition

Onion Plants

A classic mild yellow onion with excellent size potential.

Out Of Stock

Redwing Onion Plants & Sets

Redwing

(F1) Onion Plants

Reliable long-storage red.

Out Of Stock