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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Scout Full-Size Onions

Scout

(F1) Onion Seed

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

New York Early Full-Size Onions

New York Early

Organic Onion Seed

Classic yellow OP strain, dependable and productive early onion.

Powell Full-Size Onions

Powell

Organic (F1) Onion Seed

Organic and downy mildew-resistant long-day onion.

Elsye Full-Size Onions

Elsye

Organic (F1) Onion Seed

Very upright plant habit.

Rossa di Milano Full-Size Onions

Rossa di Milano

Organic Pelleted Onion Seed

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

Ailsa Craig Full-Size Onions

Ailsa Craig

Organic Pelleted 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.

Frontier Full-Size Onions

Frontier

(F1) Onion Seed

Downy mildew resistance for a wider range of latitudes.

Monastrell Full-Size Onions

Monastrell

Organic Pelleted (F1) Onion Seed

Long harvest window.

T-448 Full-Size Onions

T-448

(F1) Onion Seed

Earliest long-day overwintering onion for the North.

Bridger Full-Size Onions

Bridger

(F1) Onion Seed

First-early onions from seed.

Talon Full-Size Onions

Talon

Organic Pelleted (F1) Onion Seed

Organic long-day storage onion.