Bending onion stalks - Knowledgebase Question

San Ramon, CA
Avatar for timurileng
Question by timurileng
June 23, 1998
My onion plants, which I planted from sets in the fall, are still green. At what point in time should I bend over the stalks and leaves so that onions will form? Should this be done after the stalks and leaves have started to turn yellow? Or is it necessary to do it at all? (Incidentally, each time I saw a flower bud starting to form, I have nipped off the flower bud just beneath the bud. I hope that was the right thing to do.)

Answer from NGA
June 23, 1998
Generally speaking, onions grow tops in the cool weather and form bulbs when the weather warms. If you harvest too soon, the bulbs will be small. Once the tops begin to turn yellow, bend them down to stop the flow of sap. When the tops turn brown, pull or dig the bulbs on a sunny day and leave them to dry in the sun. When the outer skins are thoroughly dry, wipe off any soil and remove the tops (unless you plan to braid them), then store in a cool, dry, airy place. You were right in cutting off the flowering stem - allowing it to grow would have diverted energy from the bulb. If you're really curious, and can't wait for the tops to yellow, you can sacrifice one plant by digging it up to see how large the bulb has grown. Otherwise, just leave them alone until the tops start to die.

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