Onion Seeds - Utah Yellow Sweet Spanish (Organic)
110-115 Days to maturity. Allium cepa. Organic Utah Yellow Sweet Spanish Onion Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, cold tolerant, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers. This yellow onion is considered a long-day type and may be grown in intermediate-day regions as well. Recommended by Utah State University and is the state vegetable of Utah. Can also be used as a companion plant for many common vegetables to organically control pests. This Spanish Onion is relatively easy to grow with moderate pink root tolerance. ~7,000 seeds per ounce.
Download Free Vegetable Growing Guide PDF
How to Grow Organic Utah Yellow Sweet Spanish Onion from Seed
Onion is a cool hardy vegetable that can be sown directly 6-8 weeks prior to the final spring frost or about 4-6 weeks before the first autumn frost. Seeds may also be begun indoors for early starts. Soil should be well-tilled, nitrogen-rich, with a pH of 6.0-7.0. For outdoor sowing, create a shallow 1-inch deep trench for a minimum of 12 inches.
Onion seed is very small, so sprinkle generously into the trench and lightly cover with about 0.25 inches of soil. As seedlings begin to sprout from the row, trim back to favor the strongest starts every 4-6 inches apart. Long-day onions grow best in the northern half of the country, while short-day thrives in the southern half.
Utah Spanish Onions take about 115 days to mature after planting seeds in the ground. Wait until the ground is not frozen and is between 60-85F. Onions thrive in soil that drains well but still needs to be dense in nutrients. As the onion grows, you will see green sprouts appear. Allow the tops of onions to fall and die before harvesting your crop. A mature Utah Yellow Spanish Onion will have light brown skin and white flesh.
Organic Utah Yellow Sweet Spanish Onion in the Vegetable Garden
Onion is a cold hardy favorite able to be sown in either spring or fall for an effortless biannual harvest. Onions are often started in the garden from store-bought bulbs, but growing from seed allows for a greater variety of selection among the red, yellow, white, and sweet cultivars.
When planting, look to see if a long day or a short day onion variety is best suited for the summers in your region. Try an onion crop in the garden bed alongside similar garlic, shallots, or leeks.
Harvesting Organic Utah Yellow Sweet Spanish Onion
Most onions sown in the spring are ready for harvest about 90 days from sowing and seeds planted in the fall can mature as early as May or June the following year. Onions are ready to harvest once the greens have dried out, yellowed, and begun to bow over. Loosen the soil from the bulb to check for consistent coloring while allowing the bulb to dry further. Sweet onions do not store as well as more pungent yellow and brown varieties.
About Organic Utah Yellow Sweet Spanish Onion Seeds
Long Day Variety. A large yellow bulbing onion that has a mild sweet flavor. Can get up to 6 inches across and weigh over a pound or more.
It is a good keeper as well for those country cooks!
It is important to dry your onions in the garden first for proper storage. Pull them up on a sunny day and let them dry in the sun for two days to cure. Then store them.
Onion seed has a short shelf life, so keep it cool and dry.
Tips From Our Gardeners
"The Utah Yellow Spanish Onion is a great slicing onion. It goes perfectly on a Patty Melt and is great as a grilled onion. Spanish Onions are known for being large, and these onions make great onions for sandwiches as well. Delicious in marinara, chili, or stew."
 - Ashleigh Smith, True Leaf Market Writer
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Organic Utah Yellow Sweet Spanish Onion Seeds Per Package:
- 2 g - Packet - Approx 500 Seeds
- 1 oz- Wholesale - Approx 7,000 Seeds
- 4 oz - Wholesale - Approx 28,000 Seeds
- 1 lb - Wholesale - Approx 112,000 Seeds
- 5 lb - Bulk - Approx 560,000 Seeds
- 25 lb - Bulk - Approx 2,800,000 Seeds
Non-GMO Organic Utah Yellow Sweet Spanish onion seeds are available for Fast Free Shipping on qualifying orders.
Basic Info
| Latin Name: | Allium cepa |
| Utah Yellow Sweet Spanish Onion Color: | Yellow |
| Utah Yellow Sweet Spanish Onion Flavor: | Sweet, mild, and enjoyed raw more than most yellow onions. |
Growing Info
| Hardiness Zone: | 2, 3, 4, 5, 6, 7, 8, 9 Technically a tender perennial, but almost always grown as an annual, unless specifically grown for seed. |
| Days to Maturity: | 110-115 |
| Days to Germination: | 7-10 |
| Seeding Depth: | 0.25 inch |
| Plant Spacing: | 3-6 inches |
| Row Spacing: | 12-15 inches |
| Plant Height: | 14-24 inches |
| Growth Habit: | Bulbing - Bulbing onions are growing for the bulb or globe they produce. |
| Soil Preference: | Sandy, loose, composted, well-draining |
| Temperature Preference: | Cooler |
| Light Preference: | Full Sun |
Other
| Direct Sow: | Yes |
| Start Indoors: | Yes Start Indoors 8-10 weeks before last frost date. |
| Onion Day Length: | Long Day - Long Day Onions need 14 to 15 hours of daylight to form a bulb. If you plan to grow in more Northern US states with hard winters, Long Day Onions are your best choice. Typically planted in spring for mid to late summer harvest. This variety may also be grown in intermediate-day regions. |
| Plant Width: | 4-6 inches |
| Growth Speed: | Late - Ready for harvest around 101 days or more from direct sowing to harvesting. |
| Germination Temperature: | 66-70 F |
| Pests and Diseases: | Susceptible to thrips, onion maggots. Onion yellows virus may stunt and infect nearby onions. |
| Garden Size: | Greenhouse, Garden Plot, Raised Bed, Container Growing |
| Onion Use: | Canning, Pickling, Slicing, Short-term Storage |