Onion Early White Grano PRR (Allium cepa) is a short-day, open-pollinated variety known for its early maturity, mild sweet flavor, and disease resistance. It produces large, round, white-skinned bulbs with a firm texture, making it an excellent choice for fresh use, cooking, and salads. This variety is particularly resistant to Pink Root Rot (PRR), ensuring a healthier crop in various growing conditions.

How to Grow Early White Grano PRR Onion

Sowing and Germination

• Starting Indoors:

  • Begin seeds indoors 8–10 weeks before the last frost.
  • Sow seeds 1/4 inch deep in seed trays with well-draining soil.
  • Maintain a temperature of 65–75°F for optimal germination.

• Direct Sowing:

  • In warm climates, sow seeds directly outdoors in late fall or early spring when soil temperatures reach at least 50°F.
  • If using sets (small bulbs), plant them 1 inch deep and 4 inches apart for faster growth.

Transplanting:

• Harden off seedlings 7–10 days before transplanting them outdoors.
• Space plants 4–6 inches apart in rows 12–18 inches apart for proper bulb development.

Soil Requirements:

• Prefers well-drained, sandy, or loamy soil with a pH of 6.0–7.0.
• Enrich the soil with compost or organic matter before planting.

Sunlight:

• Requires full sun (at least 6–8 hours daily) for optimal growth.

Growing Early White Grano PRR Onion

Watering:

• Water consistently, ensuring the soil remains moist but not soggy. Provide 1 inch of water per week, increasing in dry conditions.
• Avoid overwatering, as excess moisture can cause bulb rot.

Mulching:

• Apply a thin layer of mulch to retain moisture and suppress weeds.

Fertilizing:

• Apply a nitrogen-rich fertilizer every 2–3 weeks during early growth to encourage strong leaf development.
• Once bulbs start forming, switch to a fertilizer higher in phosphorus and potassium to support bulb development.
• Avoid excessive nitrogen after bulb formation to prevent too much leafy growth.

Pest and Disease Management:

• Resistant to Pink Root Rot (PRR), but still monitor for thrips, onion maggots, and aphids. Use neem oil or insecticidal soap if needed.
• Ensure good air circulation and avoid overhead watering to prevent fungal diseases.
• Rotate onion crops annually to reduce soil-borne diseases.

Fast Facts

• Latin Name: Allium cepa
• Type: Open-Pollinated, Short-Day Onion
• USDA Zones: 5–12
• Days to Germination: 7–14 days
• Days to Maturity: 100–110 days
• Sunlight: Full Sun
• Spacing: 4–6 inches apart
• Soil pH: 6.0–7.0
• Color: White

How and When to Harvest Early White Grano PRR Onion

• Harvest when tops begin to yellow and fall over, typically 100–110 days after planting.
• Gently pull bulbs from the soil and allow them to cure for 2–3 weeks in a warm, dry, shaded area with good airflow.
• Once fully cured, trim the roots and foliage, then store in a cool, dry place. Properly cured onions can last several months in storage.

Early White Grano PRR Onion Seed Saving

• As a biennial, onions produce seeds in their second year.
• Allow selected plants to flower and go to seed. Once seed heads dry, collect and store them in a cool, dry place for up to 3 years.

Onion Early White Grano PRR is a disease-resistant, reliable, and early-maturing variety that produces sweet, mild, and crisp white bulbs. Its high yield and adaptability make it a favorite among home gardeners and commercial growers alike. Grow your own for a delicious and long-lasting onion harvest! 🌱