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How to Grow Onions Vertically On The Windowsill
I did this about 4 years ago with quite good results! Growing onions inside is very easy, they like the constant temperature and the light from the window. I grew 10 in one bottle one year and loved it.
Check out this really easy tutorial from goodshomedesign and try it out for yourself. This design may not look pretty but growing them vertically will save space and you don’t need a garden to get some nice “homegrown” onion.