Maturity and Harvest Times
- Growing Time: Red onions from sets mature relatively quickly, with full-sized bulbs ready for harvest in 90-100 days, depending on growing conditions.
- Signs of Readiness: When the tops begin to turn yellow and flop over, the onions are reaching maturity. Once most tops have fallen, gently lift the bulbs from the ground with a garden fork to avoid bruising.
- Curing: For proper storage, cure the onions by laying them out in a dry, warm, and ventilated area (such as a shaded porch or garage) for 1-2 weeks. The outer skins will harden, and the necks will dry, preparing them for longer storage.
Cooking Applications
Red onions bring a mild, sweet flavour to dishes and are particularly prized for their raw applications and colourful presentation.
- Salads & Sandwiches: Red onions are excellent raw, adding a mild, sweet crunch and beautiful colour to salads, sandwiches, and wraps.
- Grilling & Roasting: Grilling or roasting red onions enhances their sweetness, making them a great side dish or topping for burgers, pizzas, and more.
- Pickling: Red onions are perfect for quick pickling, which mellows their flavour and makes them a delicious topping for tacos, burgers, or salads.
- Sautéing: Although red onions are milder than yellow, they work well sautéed, especially in dishes that benefit from a slightly less intense onion flavour, like pasta sauces or Mediterranean recipes.
Ideal Storage Conditions
Red onions can last for several months if properly stored, though they generally have a slightly shorter storage life than yellow onions due to their higher moisture content. Here’s how to keep them fresh:
- Temperature & Humidity: Store red onions in a cool, dry, and dark place with temperatures between 1-4°C (34-40°F), such as a cellar or basement. Avoid plastic bags, which trap moisture and can lead to rot.
- Air Circulation: Good airflow is essential for red onions. Use mesh bags, paper bags, or baskets to allow ventilation and prevent moisture buildup.
- Separate from Potatoes: Keep red onions away from potatoes, as potatoes emit ethylene gas that can accelerate onion sprouting and spoilage.