🧅 Onions
🍴 Overview
Crop: Onions
Common Varieties in OK: ‘Yellow Granex’, ‘Texas 1015Y’, ‘Red Burgundy’, ‘White Bermuda’
Planting Season: Late winter to early spring (sets or transplants); Late summer for overwintering
Days to Maturity: 90–120 days (bulbing types); 60 days (green onions)
🎨 Trait Legend
🟩 Cool-season – Tolerates cold; dislikes extreme heat during bulbing
🌱 Bulb crop – Grown for underground bulb
☀️ Full sun – Needs 6+ hours of sun daily
🌱 Replant OK – Spring and fall planting options
📏 Spacing & Soil
Row Spacing: 12–18 inches
Plant Spacing: 4–6 inches
Soil Needs: Loose, well-drained, high in phosphorus; pH 6.0–7.0
Fertilizer: Phosphorus at planting; nitrogen side-dressed every 3–4 weeks
🌱 Cultivars We Recommend
‘Yellow Granex’ 🟩
Mild, sweet yellow. Similar to Vidalia. Great for fresh eating.
‘Texas 1015Y’ 🟩
Developed for southern growers. Large, sweet, and dependable.
‘Red Burgundy’ 🟩
Beautiful red onion. Mild flavor and short-day friendly.
‘White Bermuda’ 🟩
Great for slicing or grilling. Fast-growing, globe-shaped.
🧠 Tips
Onions are daylight-sensitive: grow short-day types in Oklahoma
Don’t bury bulbs too deep — just enough to anchor
Stop watering when tops fall over naturally
Cure harvested bulbs in a dry, shady spot for 2–3 weeks
Use thinnings as green onions early in the season