Learn About Onions

Grower’s Library key growing information How to Grow Cipollini Onions From Seed How to grow cipollini and mini onions from seed: soil and sun, latitude, sowing in bands, seeding rates, and harvesting bunches. Open resource →

Grower’s Library key growing information How to Grow Onions From Seed How to grow onions from seed: soil, day-length types, starting transplants for long-, intermediate- and short-day onions, direct sowing, overwintering, watering, harvest, curing and storage. Open resource →

Grower’s Library key growing information How to Grow Onions From Sets How to grow onions from sets: planting soon after arrival, soil and pH, depth and spacing, spring or fall planting with low tunnels, disease, thrips and weed control,... Open resource →

Grower’s Library technical document Onion & Leek Production from Transplants | Tech Sheet Follow the instructions in this Tech Sheet for onion (Allium cepa) and/or leek (Allium porrum) production from transplants. First, remove your plants from their box and plant as... Open resource →

Grower’s Library key growing information How to Grow Bunching Onions From Seed How to grow bunching onions (scallions) from seed: sowing seasons, transplanting clusters or Negi-style, direct sowing in bands, blanching, harvest and handling. Open resource →

Grower’s Library article guide Overwintering Onions from Seed How the Hensley's team overwinters onions from seed in a Zone 5a high tunnel: timing, row cover, spring growth, variety picks, sets and troubleshooting. Open resource →

Grower’s Library key growing information Growing Onions (Allium cepa) from Pelleted Seed How to grow onions from pelleted seed: soil, day-length types, starting transplants, direct sowing, overwintering, watering, harvest, curing and storage. Open resource →

Grower’s Library article guide Storage Guidelines for 16 Storage Crops Guidelines and specific recommendations on best storage practices, including temperature, humidity, and optimal shelf life for 16 classic storage crops. Open resource →

Grower’s Library chart comparison Full-Size Onion Varieties | Comparison Chart (PDF) A full-color, downloadable, printable (PDF) version of our Full-Size Onion Comparison Chart. Open resource →

Grower’s Library technical document Onions - Instructions for Growing from Sets | Tech Sheet Follow the instructions in this Tech Sheet for successful production of onions from sets. Fill the gap between last year's storage onions and this year's seed-grown onions, producing... Open resource →

Grower’s Library article guide Map & Key Features of Long-Day, Intermediate-Day & Short-Day Onions How daylength triggers onion bulbing, and which long-, intermediate- and short-day onions suit your latitude. Open resource →