Troubleshooting Why Your Onions Aren’t Forming Bulbs (or Are Too Small) By Ada Jones · Updated October 2026 · Figures checked against university extension sources linked in the text Healthy green leaves with no bulb underneath, or bulbs stuck at 1 to 2 inches, almost always trace back to one of six causes: the wrong…
Troubleshooting Why Onions Bolt (and What to Do When It Happens) By Ada Jones · Updated October 2026 · Figures checked against university extension sources linked in the text Onion bolting — when a flower stalk shoots up instead of a bulb forming — is caused by cold, not day length. Onions need about five…
Zero-Soil Method How to Regrow Green Onions in a Glass of Water Keep the white base and roots of a green onion in a glass of water, tips above the waterline, and change the water every 2 to 3 days. New growth usually appears within a week, and you can expect about 2 to 4…
Quick-Harvest Guide How to Grow Green Onions (Scallions and Spring Onions) Green onions are ready in about 50 to 70 days from seed or sets — the quickest harvest in the whole onion family. Sow or plant them 2 to 3 inches apart in full sun and loose soil, and pull them once the tops…
Starting Method Guide Growing Onions From Sets: The Fastest Way From Garden to Harvest Onion sets — sometimes loosely called “onion bulbs” at garden centers — are small, dormant onions grown the previous season. Plant them pointed end up, about 1 inch (2.5 cm) deep, in full sun as soon as the soil can be…
Starting Method Guide Growing Onions From Seed: The Complete Step-by-Step Method To grow onions from seed, sow ¼ inch (6 mm) deep indoors 8 to 12 weeks before your last frost, keep the mix at about 70°F (21°C) until germination, then harden off and transplant seedlings once they are 3 to 4 inches tall. Expect…
Kitchen-Counter Method Can You Grow an Onion From an Onion? The Honest Answer By Ada Jones · Updated October 2026 · Figures checked against extension and grower sources linked in the text Yes, you can grow an onion from an onion that’s already sprouted, or from an onion base/scraps with the roots attached — but…
Timing Guide How Long Does It Take to Grow Onions? A Timeline by Method Bulb onions take roughly 3 to 5 months from planting to harvest, depending on how you start them: up to 5 months from seed, 2 to 4 months from transplants, and about 2 months from sets — the fastest of the…
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