Yellow Granex Onion Plants | Sweet Short-Day Onion | Vidalia-Type | Mild & Bolt Resistant | ~100 Days

Yellow Granex Onion Plants – Sweet Short-Day Onion | Vidalia-Type | Live Starter Plants

Yellow Granex is the legendary short-day onion behind the famous Vidalia onion — the gold standard for sweet, mild, low-pungency onions grown in the American South. Thick, slightly flattened bulbs with thin yellow skin and bright yellow flesh deliver the characteristic sweetness that has made Vidalia-style onions world-famous. Bolt resistant, easy to grow, and exceptionally versatile in the kitchen. Ships as live starter plants — ready to go straight into the ground.

Note: Georgia legislation protects the Vidalia name — only Yellow Granex grown in the 19-county Vidalia, Georgia region may legally be called “Vidalia onions.” Regardless of where you grow them, you get the same exceptional sweet, mild flavor.

Variety Details

• Type: Short-day onion — best for growing regions below 35° N latitude
• Bulb: Thick, slightly flattened; thin yellow skin, yellow flesh
• Flavor: Sweet, mild, low pungency — the Vidalia standard
• Potential size: Up to 5.4 inches diameter in ideal conditions
• Days to maturity: ~100 days to full bulb; green onions in as little as 30 days
• Bolt resistance: Excellent
• Storage: Up to 1 month — sweet onions have thinner skins than storage varieties
• Ships as: Live starter plants — ready to transplant upon arrival

Culinary Uses

• Raw in salads, sandwiches, and burgers — mild enough to eat without overpowering
• Vidalia onion casseroles and au gratin dishes — the classic Southern preparation
• Caramelized slowly in butter for onion soup, tarts, and focaccia
• Grilled whole or halved alongside meats and vegetables
• Sweet onion relish, chutney, and jam
• Pickled rings — mild flavor pickles beautifully in apple cider vinegar
• Green onion harvest at 30 days — mild, sweet scallions for fresh use

Planting Guide

• When to plant: As soon as soil can be worked in late winter or early spring, immediately after your last expected frost date. Cool, moist soil benefits early bulb development.
• How to plant: Poke or dibble a hole 1–2 inches deep, drop the plant in, and firm soil around the roots. Plants establish quickly and begin active growth within days.
• Spacing: 4–6 inches apart in rows 12–18 inches apart for full bulb development. Closer spacing (2–3 inches) produces green onions.
• Bed depth: Prepare the bed to 4 inches. Set plants so the base sits just at or slightly below the soil surface.
• Soil: Well-draining, fertile soil with good organic matter. Avoid compacted or waterlogged ground.
• Fertilizer: Side-dress with nitrogen fertilizer 3–4 weeks after planting and again when bulbs begin to swell.
• Water: Keep consistently moist through the season, especially during bulb development. Reduce watering as tops begin to fall over — the sign of maturity.

Harvesting & Storage

• Harvest green onions starting at approximately 30 days.
• For full bulbs, wait until tops fall over naturally — typically around 100 days.
• Cure in a warm, dry, well-ventilated location for 2–3 weeks before storing.
• Use within 1 month for best quality — sweet onions have thinner skins and shorter shelf life than storage varieties.