Description: This onion is a long-day, mild, sweet onion. The 3 inch large, globe-shaped bulbs have glistening white skin, fine flesh, and excellent flavor.
Harvest– Stop watering a week before harvesting. Pull out when necks soften and start to fall over. Cure them in the sun for a few days then finish drying them out of direct sunlight, in a warm area, and in single layer so air can circulate around them until the neck is dry. Store in a cool dark place with 35-40ºF temperatures and 65-70% humidity.
Long Day White Sweet Spanish Onion bulbs will exceed 5” in diameter and are pure white and firm, thus storing well. Some globe shaped specimens may exceed 2 pounds in weight.
Sowing Outdoors– Early to mid-spring when soil temperature reaches at least 55 ºF. Sow 1-3 seeds per inch, thin to 2-6” apart. The larger the bulb size the more space.
Sowing Indoors: Start 8-10 weeks before last frost with soil temperatures 60-75ºF. Sow in flats 1/4” deep, 1/4” apart. Transplant seedlings out mid/late spring, 2-6” apart. Liquid fertilize seedlings every 7-10 days. Seedlings size should be about a pencil thick at transplanting time.
Tips– White Sweet Spanish Onion needs fertile, well drained soil. Amend with compost or apply organic granular fertilizer. Adequate water is very important for optimum growth, 1″ per week.
The Sweet Spanish White is considered a long-day type onion which is best suited for growing in northern climates such as Canada. They produce large, globe-shaped bulbs with white skin, fine flesh and excellent flavor. It is the best choice for onion rings or salad onion. The White Sweet Spanish Onion has fair to medium storage capability. Try to maintain a constant temperature for stored onions and check regularly.
Onions can be grown from seeds, sets, or transplants. If starting from seeds, start them indoors 8-10 weeks before the last expected frost date in your area. Transplants can also be purchased from a nursery or garden center. Onions prefer a sunny location and well-drained soil that is rich in organic matter. Soil pH should be between 6.0 and 7.5. If planting sets or transplants, space them 10-15cm (4-6”) apart in rows spaced 30cm (12”) apart. If planting seeds, sow them 1cm (½”) deep and 2.5-5cm (1-2”) apart in rows spaced 30cm (12”) apart. Keep the soil moist but not waterlogged during the growing season. Onions prefer consistent watering throughout the season. Fertilize with a nitrogen-rich fertilizer every 3-4 weeks during the growing season. Onions are ready for harvest when the leaves turn yellow and start to fall over. Carefully lift the onions out of the soil and lay them out in a dry, well-ventilated area to cure for 1-2 weeks before storing.
This Transplanting Method for Onions Is a GAME CHANGER
FAQ
How big do Spanish onions get?
How do you harvest white Spanish onions?
What are Spanish white onions?
Are white Spanish onions long-day?
How big do onions grow?
That way, you can plan the number of plants and the amount of space you will need for your crop of onions. So, how big do onions get? Onion plants grow 10 to 30 inches (25 to 76 centimeters) tall, 4 to 24 inches (10 to 61 centimeters) wide, and produce bulbs that are 1 to 6 inches (2.5 to 15 centimeters) in diameter.
How do you grow Spanish onions?
Once the Spanish onions seeds have been planted, it’s crucial to keep the soil wet, but do not over-saturate with moisture because it will cause the seeds to rot. Sulfate-based fertilizer that growers use tends to produce a stronger tasting Spanish onion, while soil rich in nitrates will have a milder taste.
How long does a white onion take to grow?
Gladstone: Gladstone is a white onion that’s somewhat sweet and suited for northern growing. It matures in 110 days. Walla Walla: Walla Walla is resistant to disease, features white flesh and produces uniform bulbs. It’s a long day onion. Long-day onions are ideal for colder climates, while short-day onions are best for warmer southern climes.
How long does it take a Spanish onion to grow?
Valencia: Valencia is another Spanish-type onion. It has beautiful brown skin and milder flavor than other varieties. It matures in 120 days. Gladstone: Gladstone is a white onion that’s somewhat sweet and suited for northern growing. It matures in 110 days.