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

52 Products

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Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Onion Seed

A classic mild yellow onion with excellent size potential.

Sierra Blanca Full-Size Onions

AAS (All-America Selections) Winners

Sierra Blanca

(F1) Onion Seed

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

Monastrell Full-Size Onions

Monastrell

Organic (F1) Onion Seed

Long harvest window.

Talon Full-Size Onions

Talon

Organic (F1) Onion Seed

Organic long-day storage onion.

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Frontier Full-Size Onions

Frontier

(F1) Onion Seed

Downy mildew resistance for a wider range of latitudes.

Calibra Full-Size Onions

Calibra

Organic (F1) Onion Seed

Storage onion for intermediate latitudes.

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted Onion Seed

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

Walla Walla Onion Plants & Sets

Walla Walla

Onion Plants

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

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.

Candy Full-Size Onions

Candy

(F1) Onion Seed

Widely adapted Walla Walla type for growing farther South.

Safrane Full-Size Onions

Safrane

(F1) Onion Seed

A hard yellow storage onion for the main season.

Talon Full-Size Onions

Talon

Organic Pelleted (F1) Onion Seed

Organic long-day storage onion.

Ailsa Craig Exhibition Onion Plants & Sets

Ailsa Craig Exhibition

Onion Plants

A classic mild yellow onion with excellent size potential.

Red Carpet Full-Size Onions

Red Carpet

Organic Pelleted (F1) Onion Seed

Vibrant red, long-day storage onion.

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.

Candy Onion Plants & Sets

Candy

(F1) Onion Plants

Widely adapted Walla Walla type for growing farther South.

Patterson Full-Size Onions

Patterson

Pelleted (F1) Onion Seed

Exceptionally long-storing yellow onion.

Bridger Full-Size Onions

Bridger

(F1) Onion Seed

First-early onions from seed.

Blush Plants Full-Size Onions

Blush Plants

(F1) Onion Plants

Unique pink specialty onion.

Expression Full-Size Onions

Expression

(F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Bridger Full-Size Onions

Bridger

Pelleted (F1) Onion Seed

The best onion for overwintering in the North.

Expression Full-Size Onions

Expression

Pelleted (F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Elsye Full-Size Onions

Elsye

Organic (F1) Onion Seed

Very upright plant habit.

White Castle Full-Size Onions

White Castle

(F1) Onion Seed

Short-day onion with excellent color and disease resistance.

Red Spring Full-Size Onions

Red Spring

(F1) Onion Seed

Red long-day onion for overwintering.

Madalyn Full-Size Onions

Madalyn

(F1) Onion Seed

Dependable short-day onion.

T-448 Full-Size Onions

T-448

(F1) Onion Seed

Earliest long-day overwintering onion for the North.

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

White Ace Full-Size Onions

White Ace

(F1) Onion Seed

Our recommended substitute for White Castle.

Yellow Granex Onion Plants & Sets

Yellow Granex

(F1) Onion Plants

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

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Pelleted Onion Seed

A classic mild yellow onion with excellent size potential.

Redwing Full-Size Onions

Redwing

Pelleted (F1) Onion Seed

Reliable long-storage red.

Blush Full-Size Onions

Blush

(F1) Onion Seed

Unique pink specialty onion with excellent storage potential.

Sale

Scout Full-Size Onions

Scout

(F1) Onion Seed

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