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

48 Products

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.

Expression Full-Size Onions

Expression

(F1) Onion Seed

Large, intermediate-day, yellow Spanish variety.

Patterson Full-Size Onions

Patterson

Pelleted (F1) Onion Seed

Exceptionally long-storing yellow onion.

Cabernet Full-Size Onions

Cabernet

(F1) Onion Seed

Early yields of red onions without sacrificing size.

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Redwing Full-Size Onions

Redwing

(F1) Onion Seed

Reliable long-storage red.

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.

White Castle Full-Size Onions

White Castle

(F1) Onion Seed

Short-day onion with excellent color and disease resistance.

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Onion Seed

A classic mild yellow onion with excellent size potential.

Blush Full-Size Onions

Blush

(F1) Onion Seed

Unique pink specialty onion with excellent storage potential.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted 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.

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Pelleted Onion Seed

A classic mild yellow onion with excellent size potential.

Red Carpet Full-Size Onions

Red Carpet

Organic (F1) Onion Seed

Vibrant red, long-day storage 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.