Spanish Onions Harvested http://www.durgan.org/URL/?WAAPU 21 August 2009 Spanish Onions Harvested The tops were soft just above the bulb. This is a good indication that the onions are ready to harvest. Sixty seven plants were collected for a total weight of 42 pound about a 1/2 pound per onion average. The small seed bulbs were planted on 8 April 2009. the area was mulched and they were not disturbed until harvest. About 16 were culled for various reasons, like rotting, and misshapen.They will be dried in the sun for a few days then stored in a paper yard bag. I prefer burlap or jute bags, but they are not readily available. The crop will be stored in the basement, which is the coolest place that is available.