Red Onion Sets | Long-Day Planting Bulbs

Grow red onions with deep purple skins and firm, pink-tinged white flesh marked by red rings. These long-day onion sets develop into flavorful bulbs for everyday cooking, with a bold onion taste and good storage potential when properly cured. Start with planting bulbs rather than seed and enjoy the satisfaction of lifting your own red onion harvest.

What you’re getting

• Product: Red onion sets for planting, not seed
• Day length: Long-day onions; bulb formation begins with approximately 14–16 hours of daylight
• Color: Deep purple skin with pink-tinged white flesh and red rings
• Flavor: Strong and pungent
• Available quantities: 10 bulbs, 1/2 lb, 1 lb, or 5 lbs

Growing and care

Choose a planting time suited to your local climate and follow the planting instructions supplied with the sets. Keep plants well watered during establishment and bulb development, reducing watering as the bulbs approach maturity. Long-day onions need suitable summer day lengths to form full-sized bulbs, so consider your location when choosing this type.

Harvest and curing

Harvest when bulbs have reached full size and the tops begin to fall over naturally and turn brown. Lift carefully, shake off loose soil, and leave the outer skins intact. Cure in a dry, shaded, well-ventilated area until the necks and outer skins are dry. Once cured, trim the roots and tops, leaving about 1 inch of stem.

Storage and kitchen uses

Store cured onions in a cool, dry place and check regularly for softening or sprouting. Storage life depends on curing and conditions. Slice or dice for cooked dishes, or use where you want a pronounced onion flavor and colorful red rings.