
Home-grown onions make every meal taste just a little bit better. IFA onion varieties are specially selected for their excellent flavor and ability to thrive in our intermountain climates, making them ideal for backyard growers and vegetable producers.
Onion Varieties
Availability varies by season and location.
Candy onions combine the best qualities of short-day and long-day onions for a firm and juicy hybrid variety. This popular variety is great for beginners and very easy to grow due to their strong root system and disease resistance. Candy onions will produce beyond your expectations!
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 90 to 100
Bulb size potential: 6"
Storage potential: 3 months
Plants per Bunch: Approx. 50-75
Highlander onions are very firm, easy to cure and very distinguishable with their slightly-flat, globe-shaped bulbs that are light in color. These onions are hardy with great tolerance for botrytis and downy mildew. Its sweet flavor is excellent in sandwiches, burgers, salads and even perfect for grilling.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 90
Bulb size potential: 3-4"
Storage potential: 4-5 months
Plants per Bunch: Approx. 50-75
Red Candy are reliable, intermediate-day red onions that are so sweet you can eat them raw! The bulbs are a vivid red-violet in color and contain a higher concentration of quercetins, an antioxidant compound that helps delay or slow damage to the cells and tissue of the body. Delicious in Stir-fries, colorful in kebabs and crunchy when sliced for hamburgers.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 95
Bulb size potential: 3"
Storage potential: 2 to 3 months
Plants per Bunch: Approx. 50-75
A large onion with a uniform deep-red color, Redwing onions have exceptional holding ability and great mild flavor. Once harvested, the onions continue to develop in storage. They are excellent for slicing and eating fresh in salads or sandwiches.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 120
Bulb size potential: 3-4"
Storage potential: 8-10 months
Plants per Bunch: Approx. 50-75
Ringmaster onions are an improved strain of the Sweet Spanish with white skin and a sweet, mild flavor and excellent crisp. These onions have thick crispy rings surrounding a single center, making them just perfect to slice for succulent onion rings or for garnishing burgers. They can also be harvested early for tasty “Green onions”.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 100
Bulb size potential: 5"
Storage potential: 4-5 months
Plants per Bunch: Approx. 50-75
Winner of the coveted All-American Selection Award, Super Star is a widely adaptable white onion variety that will grow well in almost all areas. This proven variety is suitable for intermediate-day areas with strong, tall foliage that protects the bulbs from sun burning. A mild crisp onion with wonderful thick rings, a slice will overlap the edge of the burger bun.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to Harvest: 95
Bulb size potential: 4"
Storage potential: 2 months (best used fresh).
Plants per Bunch: Approx. 50-75
Famous for its size and sweetness, Walla Walla onions are firm-texture and perfect when used fresh from the garden. These onions can be harvested early for mildest flavor. These onions are short keepers, making it best to use them soon after harvest for fresh eating, cooking, freezing or freeze drying.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to harvest: 90
Bulb size potential: 6"
Storage potential: 1 month
Plants per Bunch: Approx. 50-75
Popular with gardeners, Yellow Spanish are jumbo-sized onions that have a mild flavor with a golden brown skin. These golden onions grow quickly without much effort and produce fruit up to a pound. Not to mention their great flavor lasts longer than most other varieties. They are great in Italian sauces, make wonderful onion rings and are excellent for grilling.
Characteristics:
Disease Resistance: Excellent disease resistance
Days to Harvest: 100
Bulb size potential: 6"
Storage potential: 4 months
Plants per Bunch: Approx. 50-75

Harvesting Onions
Start your onion harvest when the tops begin to turn yellow, lose structure, and dry out. This signals that the bulbs have fully matured. Next, loosen the soil and gently pull the onions from the base of the base. Place them in a warm, dry, well-ventilated area to cure before storage.
Helpful Tools
Organic Matter (Compost):
Compost or another form of organic matter is a good way to improve soil drainage for more productive onions.
Fertilizer:
Planting – Phosphate does not move through the soil after planting and is essential for onion growth. Consider working Fertilome Tomato and Vegetable Food (7-22-8), Bone Meal (0-10-0) or IFA 11-52-0 Granular Fertilizer into the soil when planting.
Growing – After planting, you can use an all-purpose garden fertilizer. IFA Grand Champion All-Purpose Garden Fertilizer (16-16-16) is a great option to help the onions grow, but you should stop adding fertilizer once the bulb has formed.
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