The Sweet Spanish onion was grown in the U.S. at least as far back as 1916. Yellow Sweet Spanish Utah is from that early type, producing large, 3″–6″ globe-shaped bulbs with amazingly mild, sweet flavor. A long-day variety, it grows best in states north of the 37th parallel. Utah designated this onion the state vegetable in 2002. Caramelize onions for the perfect patty melt condiment.
Variety Info: Large, 3 ½”–6″, up to 2 lbs., pale yellow, globe-shaped bulbs with coppery wrapper; 12″–18″ tops. Yellow Sweet Spanish Utah is a bulbing, yellow, long-day onion with a moderate storage period.
When to Sow Outside: 4 to 6 weeks before your average last frost date, or as soon as soil can be worked; when soil temperature is at least 45°F.
When to Start Inside: RECOMMENDED. 10 to 12 weeks before your average last frost date. Transplant outdoors 4 to 6 weeks before your average last frost date. The earlier the start, the bigger the bulb. Ideal soil temperature is 60°–85°F.
Harvesting: When onion tops have fallen over and turned yellow or brown, they are ready for harvest. Harvest in the morning, lifting onions with a garden fork. Dry them in the garden in the sun for 2 to 3 days, lightly covering the bulbs with straw, or the tops of other onions to prevent sunscald. Cure onions for 3 to 7 days in a dry area with good air circulation. Once dry, cut the roots to 1/4″, and the greens to 1″ to create a seal, preventing decay.
One of the most popular for gardeners, this jumbo-sized onion is mild with golden brown skin. These golden onions produce fruit up to a pound (16 oz) and their great flavor lasts longer than most other varieties.
Watering: Onions are shallow rooted and grow best with at least 1″ per week of rain or irrigation, especially during the bulbing phase.
The mechanical transfer of genetic material outside of natural reproductive methods and between genera, families or kingdoms, poses great biological risks as well as economic, political, and cultural threats. We feel that genetically engineered varieties have been insufficiently tested prior to public release. More research and testing is necessary to further assess the potential risks of genetically engineered seeds. Further, we wish to support agricultural progress that leads to healthier soils, to genetically diverse agricultural ecosystems, and ultimately to healthy people and communities.
Before Planting: Onions require full sun and fertile, well-drained soil with a pH of 6.0-7.0. Sandy loam soils with good moisture retention are recommended. Add some peat moss can help with moisture retention.
To learn more about the “Safe Seed Pledge” please visit www.councilforresponsiblegenetics.org.
Tips: Onion bulbing is triggered by day length, and maximum day length during the growing season increases from south to north. Short-day onions are grown at lower latitudes in the South, while intermediate and long-day onions are grown at higher latitudes. Refer to “Adaptation” in each variety description for details.
When to Sow Outside: 4 to 6 weeks before your average last frost date, or as soon as soil can be worked; when soil temperature is at least 45°F.
Variety Info: Large, 3 ½”–6″, up to 2 lbs., pale yellow, globe-shaped bulbs with coppery wrapper; 12″–18″ tops. Yellow Sweet Spanish Utah is a bulbing, yellow, long-day onion with a moderate storage period.
Harvesting: When onion tops have fallen over and turned yellow or brown, they are ready for harvest. Harvest in the morning, lifting onions with a garden fork. Dry them in the garden in the sun for 2 to 3 days, lightly covering the bulbs with straw, or the tops of other onions to prevent sunscald. Cure onions for 3 to 7 days in a dry area with good air circulation. Once dry, cut the roots to 1/4″, and the greens to 1″ to create a seal, preventing decay.
The Sweet Spanish onion was grown in the U.S. at least as far back as 1916. Yellow Sweet Spanish Utah is from that early type, producing large, 3″–6″ globe-shaped bulbs with amazingly mild, sweet flavor. A long-day variety, it grows best in states north of the 37th parallel. Utah designated this onion the state vegetable in 2002. Caramelize onions for the perfect patty melt condiment.
When to Start Inside: RECOMMENDED. 10 to 12 weeks before your average last frost date. Transplant outdoors 4 to 6 weeks before your average last frost date. The earlier the start, the bigger the bulb. Ideal soil temperature is 60°–85°F.
Seed Starting Onions For The 2022 Garden!!! Yellow Sweet Spanish, Australian Brown, & Cabernet Red!
FAQ
How do you care for yellow sweet Spanish onions?
What’s the difference between sweet yellow onion and yellow onion?
How long do yellow sweet Spanish onions store?
What is the equivalent of a Spanish onion?