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

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Safrane Full-Size Onions

Safrane

(F1) Onion Seed

A hard yellow storage onion for the main season.

Red Rock Full-Size Onions

Red Rock

(F1) Onion Seed

The best red onion for southern growers.

Walla Walla Sweet Full-Size Onions

Walla Walla Sweet

Onion Seed

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.

Patterson Full-Size Onions

Patterson

(F1) Onion Seed

Exceptionally long-storing yellow onion.

Madalyn Full-Size Onions

Madalyn

(F1) Onion Seed

Dependable short-day onion.

Red Spring Full-Size Onions

Red Spring

(F1) Onion Seed

Red long-day onion for overwintering.

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.

White Castle Full-Size Onions

White Castle

(F1) Onion Seed

Short-day onion with excellent color and disease resistance.

Cabernet Full-Size Onions

Cabernet

(F1) Onion Seed

Early yields of red onions without sacrificing size.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Onion Seed

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

T-448 Full-Size Onions

T-448

(F1) Onion Seed

Earliest long-day overwintering onion for the North.