I found the instructions of how to plant onions from discarded bottoms. Unfortunately it didn't work for me. I will try again. Has anybody had luck with it?
May 21, 2010
You will need: Onion Clean Knife Cutting Board Starter Pot with Potting Soil (optional)
tep 2Slice Off Onion Bottom
Chop off the onion bottom with all the roots still intact. The more of a bottom you leave on, the better. Try for 1.5-2 inches of attached "meat". Allow to dry for a few hours to a couple days in a shaded, well-ventilated area to allow for callousing. Note: You might only need a few hours for callousing. If the cut portions are dry to the touch and slightly shriveled
Fill the starter pot 2/3 of the way full and compact. Create an indentation in the center to cradle the onion bottom and allow for good soil contact. Cover with 1-2 inches of soil. Water as needed. Note: You can skip the starter pot if you can't be bothered and plant it directly in the ground.
Once the onion bottom has developed a few leaves, remove from the pot. Remove old onion scales. Separate plants as needed by slicing between plants and leaving a portion of the roots attached. You may have more than 1 plant develop from a single onion bottom. Replant in a prepared growing bed. Cut leaves down to 1/3 of the size to allow the bulb to develop. good luck.
May 26, 2010
Ive never grown onions from seeds or bottoms, but we love "green onions" for salad, baked potatoes, etc. When I find one of my store bought yellow onions sprouting I plant the entire onion, leaving the sprout on top of soil in flower pot. In just couple weeks grows wonderful long "green onion stem" that I just cut the needed amount that day and enjoy. I set it on my deck in full sun and water just like my flowers.