Onion Intermediate Day Spanish Sweet Yellow is a distinguished heirloom variety with deep historical roots in Mediterranean onion cultivation, delivering exceptional flavor complexity and reliable performance across intermediate-day growing regions. This non-GMO variety produces characteristically large, uniformly round bulbs with pale yellow exterior skins and crisp white, juicy flesh that develops remarkable sweetness as bulbs mature. The substantial bulb size and superior flesh quality make Spanish Sweet Yellow exceptionally valuable for both fresh consumption and diverse culinary applications. Spanish Sweet Yellow's intermediate-day photoperiod requirement provides geographic flexibility, enabling successful cultivation across moderate climates where traditional long-day varieties struggle. Expect mature, harvestable bulbs in approximately 100–120 days under favorable conditions.

Germination Rate: 85%. Test Date: 8/25. OSI.

Why Choose Onion Intermediate Day Spanish Sweet Yellow?

• Heirloom Seed: Passed down through generations for reliable harvests with superior flavor and consistent growth.
• Non-GMO Seeds: Plants whose DNA structure has not been altered in ways that do not occur naturally through traditional breeding methods.
• Dual Use: Ideal for fresh eating in salads or salsas, and perfect for cooking in soups, stews, and sautés.
• Rich in Flavor: Sweet, mild flavor with a juicy texture, perfect for those who prefer a less pungent onion.
• Hardy & Adaptable: Thrives in intermediate-day length climates, making it ideal for a wide range of growing regions.
• Long-Lasting: Known for excellent storage qualities, allowing you to enjoy homegrown onions for months after harvest.

Planting Tips for Success

• When to Plant: Start seeds indoors 8–10 weeks before the last frost date, or direct sow in early spring once soil is workable. In Texas and warm climates, plant in fall for a spring harvest.
• Sunlight: Full sun — at least 6–8 hours of direct sunlight daily for optimal bulb development.
• Soil: Fertile, well-draining soil with a pH of 6.0–7.0. Amend with compost or aged manure before planting.
• Planting Depth: Sow seeds ¼ inch deep.
• Spacing: Space transplants or thin seedlings to 4–6 inches apart in rows 12–18 inches apart.
• Watering: Water regularly to keep soil consistently moist but avoid waterlogging. Reduce watering as bulbs mature and tops begin to fall over.
• Support: No staking needed — onions grow low and compact.
• Fertilizing: Apply a nitrogen-rich fertilizer every 2–3 weeks during early growth. Stop fertilizing once bulbs begin to swell.
• Days to Maturity: Approximately 100–120 days from transplant.
• Harvest: Harvest when tops fall over and begin to dry. Cure bulbs in a warm, dry location for 2–3 weeks before storing.

Why Choose David's Garden Seeds®?

• Veteran-Owned: Supplying premium seeds since 2009.
• GO TEXAN Certified: Supporting local agriculture and communities.
• Integrity Pledge: David's Garden Seeds has taken the Seed Integrity Pledge.
• Great Customer Service: David answers all customer service questions. Usually within a few minutes.
• Vegetable Seed License: David's Garden Seeds has been granted a Vegetable Seed License for the State of Texas.

Cooking Methods

• Fresh & Raw: Slice thin for sandwiches, salads, salsas, or pico de gallo.
• Caramelized: Slow-cook in butter or olive oil until golden and sweet — perfect for burgers, flatbreads, and pasta.
• Roasted: Halve and roast alongside other vegetables for a rich, savory side dish.
• Soups & Stews: A foundational ingredient in French onion soup, beef stew, and vegetable broth.
• Pickled: Quick-pickle in vinegar and sugar for a tangy topping on tacos, bowls, and charcuterie boards.

Order Spanish Sweet Onion Seeds Today

Order now and grow your own fresh onions in your spring and fall gardens.

Nutritional Information

Per 1 medium onion (approx. 110g), raw:

• Calories: 44
• Total Fat: 0.1g (0% Daily Value)
• Sodium: 4mg (0% Daily Value)
• Total Carbohydrates: 10.3g (4% Daily Value)
• Dietary Fiber: 1.9g (7% Daily Value)
• Total Sugars: 4.7g
• Protein: 1.2g
• Vitamin C: 7.4mg (8% Daily Value)
• Vitamin B6: 0.1mg (9% Daily Value)
• Potassium: 161mg (3% Daily Value)

Important Disclosures

• Variety Disclaimer: Seed variety, packet size, and count are as described. Results may vary depending on growing conditions, climate, soil quality, and gardening practices.
• Seed Storage: Store seeds in a cool, dry place away from direct sunlight. Properly stored seeds maintain best viability for 1–2 years.
• Planting Zones: Suitable for USDA Hardiness Zones 3–9 as a cool-season annual. Intermediate-day varieties perform best in regions with 12–14 hours of daylight at bulbing. In Texas, ideal for fall planting in central and south regions.

Grow something beautiful. Grow something delicious. Grow with David's Garden Seeds®.