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

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Madalyn Full-Size Onions

Madalyn

(F1) Onion Seed

Dependable short-day onion.

Calibra Full-Size Onions

Calibra

Organic (F1) Onion Seed

Storage onion for intermediate latitudes.

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Monastrell Full-Size Onions

Monastrell

Organic (F1) Onion Seed

Long harvest window.

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

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.

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.

Red Carpet Full-Size Onions

Red Carpet

Organic (F1) Onion Seed

Vibrant red, long-day storage onion.

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.

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.