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

Skip to main content Skip to footer content

New for 2026. SHOP NOW →

0

View Cart

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

50 Products

Sort By:

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

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.

Monastrell Full-Size Onions

Monastrell

Organic (F1) Onion Seed

Long harvest window.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted Onion Seed

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

Talon Full-Size Onions

Talon

Organic (F1) Onion Seed

Organic long-day storage onion.

Patterson Onion Plants & Sets

Patterson

(F1) Onion Plants

Extremely long-storage yellow onion.

Expression Full-Size Onions

Expression

(F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Frontier Full-Size Onions

Frontier

(F1) Onion Seed

Downy mildew resistance for a wider range of latitudes.

Talon Full-Size Onions

Talon

Organic Pelleted (F1) Onion Seed

Organic long-day storage onion.

Red Carpet Full-Size Onions

Red Carpet

Organic Pelleted (F1) Onion Seed

Vibrant red, long-day storage onion.

Redwing Onion Plants & Sets

Redwing

(F1) Onion Plants

Reliable long-storage red.

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Bridger Full-Size Onions

Bridger

(F1) Onion Seed

First-early onions from seed.

Walla Walla Onion Plants & Sets

Walla Walla

Onion Plants

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

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Expression Full-Size Onions

Expression

Pelleted (F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Scout Full-Size Onions

Scout

(F1) Onion Seed

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

Redwing Full-Size Onions

Redwing

(F1) Onion Seed

Reliable long-storage red.

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

Blush Plants Full-Size Onions

Blush Plants

(F1) Onion Plants

Unique pink specialty onion.

Redwing Full-Size Onions

Redwing

Pelleted (F1) Onion Seed

Reliable long-storage red.

Safrane Full-Size Onions

Safrane

(F1) Onion Seed

A hard yellow storage onion for the main season.

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.

Elsye Full-Size Onions

Elsye

Organic (F1) Onion Seed

Very upright plant habit.

Candy Onion Plants & Sets

Candy

(F1) Onion Plants

Widely adapted Walla Walla type for growing farther South.

Ailsa Craig Exhibition Onion Plants & Sets

Ailsa Craig Exhibition

Onion Plants

A classic mild yellow onion with excellent size potential.

Madalyn Full-Size Onions

Madalyn

(F1) Onion Seed

Dependable short-day onion.

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.

Bridger Full-Size Onions

Bridger

Pelleted (F1) Onion Seed

The best onion for overwintering in the North.

T-448 Full-Size Onions

T-448

(F1) Onion Seed

Earliest long-day overwintering onion for the North.

Yellow Granex Onion Plants & Sets

Yellow Granex

(F1) Onion Plants

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

Blush Full-Size Onions

Blush

(F1) Onion Seed

Unique pink specialty onion with excellent storage potential.

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