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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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.

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Onion Seed

A classic mild yellow onion with excellent size potential.

Monastrell Full-Size Onions

Monastrell

Organic (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.

Talon Full-Size Onions

Talon

Organic (F1) Onion Seed

Organic long-day storage onion.

Calibra Full-Size Onions

Calibra

Organic (F1) Onion Seed

Storage onion for intermediate latitudes.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted Onion Seed

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

Frontier Full-Size Onions

Frontier

(F1) Onion Seed

Downy mildew resistance for a wider range of latitudes.

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Walla Walla Onion Plants & Sets

Walla Walla

Onion Plants

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

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.

Patterson Full-Size Onions

Patterson

Pelleted (F1) Onion Seed

Exceptionally long-storing yellow onion.

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.

Ailsa Craig Exhibition Onion Plants & Sets

Ailsa Craig Exhibition

Onion Plants

A classic mild yellow onion with excellent size potential.

Candy Onion Plants & Sets

Candy

(F1) Onion Plants

Widely adapted Walla Walla type for growing farther South.

Bridger Full-Size Onions

Bridger

(F1) Onion Seed

First-early onions from seed.