Vegetables

How to Plant, Grow, and Care for Red Onions

If you love cooking, you probably love the taste and versatility of red onions. But did you know that you can grow these onions easily at home? In this article, horticulture expert Matt Dursum covers how to plant, grow, and....

care for red onions in your garden.

Red onions are a magical ingredient. They give salads and sandwiches a satisfying spicy crunch. Curries and chutneys wouldn’t be the same without them. And red onion pickles? Don’t get me started!

As versatile as they are in the kitchen, these tender bulbs are equally easy to grow in the garden. They’ll stand up to almost any climate, and novice gardeners can enjoy their easy maintenance and bountiful harvests.

Let’s dive into learning more about red onions and how to grow them in your home garden. With a few guidelines in mind, you can harvest massive red onions throughout the year.
What Is It?
Red onions are herbaceous biennial vegetables with flavorful foliage and juicy bulbs. They’re members of the Amaryllidaceae family of plants, which include garlic, white onions, leeks, shallots, and chives.

They’re some of the oldest and most widely used vegetables on earth. The red variety evolved over thousands of years from species of wild onions. Humans have cultivated them since ancient times. In India, the first record of their use dates back 5,000 years and in ancient Egypt, to 3500 B.C.E.

The red color of these onions comes from anthocyanin pigments in their skin. These natural dyes have powerful antioxidant, anti-inflammatory, and cardioprotective properties. These bulbs also contain a huge amount of vitamins and minerals. Because of this, these allium varieties are incredibly important in a healthy diet.

Characteristics
Red onions are biennial but often grown as annuals. You can harvest them around 110 to 115 days after sowing.

They grow large and flavorful green foliage around their bulbous base. The leaves are hollow and can grow up to 2 feet tall.

Every part of the plant is edible and highly nutritious for humans. However, they may be toxic to pets such as dogs, horses, and cats.

Native Area
Red onions evolved from wild onions in Central Asia, similar to white onions and other species in the Allium genus. Ancient societies propagated them for their red color, and soon, they spread throughout the ancient world.

From ancient Egypt to ancient China, these delicious bulbs became mainstay ingredients in a variety of cuisines. People then brought them to the Mediterranean region where they took hold in Greece and Rome. Pliny the Elder wrote about them and the ancient Greeks used them as a dietary supplement.

After spreading throughout Europe, these red-skinned bulbs made it across the pond to the Americas. Today, these flavorful crops grow all over the world and are some of the most widely consumed vegetables on the planet.

Planting
You can grow healthy plants from seeds, bulbs, or transplants. Seeds are a little harder to grow, but they are cheaper. All you’ll need are the right growing conditions and healthy seeds under a year old.

Plant your sets in early spring, just before the last frost date. Once you can work the soil in your garden, you can get them in the ground. These vegetables are cold hardy and don’t mind a little frost.

Find an area with full sun and rich, well-drained soil. Place each immature bulb or ‘set’ into the soil about 1 or 2 inches deep. Keep the rows over 1 foot wide and space your sets apart by around 6 inches. This will encourage aeration and prevent harmful fungal infections from forming in cramped growing conditions.
How to Grow
Like other members of the onion family, red onions are incredibly easy to grow. However, there are a few common mistakes to avoid. Read on below to learn more about how to grow these wonderful staple vegetables.