Red Grano Onion Heirloom Seeds

Red Grano is a short-day onion with red bulbs for fresh slicing and cooking. It suits Southern cool-season onion schedules.

Packet: 50 seeds

Planting at a glance

• Season: Cool season; daylength-sensitive
• Start: Start seedlings 8–10 weeks before the intended planting-out date, or direct sow where suitable
• Seed depth: ¼–½ inch
• Germination: Usually 4–20 days around 70–75°F
• Final spacing: Thin bulbing onions to about 4–6 inches; rows about 14 inches apart
• Light: Full sun
• Harvest planning: Typical crop window: 100–130 days from seeding, with strong variety and regional differences

When to plant

Match the onion’s short-, intermediate- or long-day requirement to your region. South Florida bulb-onion planting is generally in October.

How to plant

1. Prepare loose, well-drained soil or a clean seed-starting mix. Start seedlings 8–10 weeks before the intended planting-out date, or direct sow where suitable.
2. Sow ¼–½ inch deep. Keep the seedbed evenly moist until seedlings emerge. Then water when the soil needs it, allowing excess water to drain.
3. Thin or transplant to the listed final spacing. Give seedlings sufficient light and check moisture as roots establish.

How to harvest

Harvest bulbs when tops naturally soften and fall. Cure in a dry, airy place before storage.

Aunt E’s tip: Check daylength suitability before choosing a planting date; the wrong type may make plenty of leaves but poor bulbs.