I had great success from my 1m x1m square three sisters bed this year - an amazing abundance of corn,5 lovely butternut squashes that I shall pick shortly, my beans did OK (but next year I shall grow a 'climber' rather than borlottis, which spent most of the summer in the shade
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So, here I am really switched on to maximising the amount I can get out of a small space.
Are there any other veggie 'combos' that you can do besides the Three Sisters to maximise the available space? I have 5 1mx1m raised beds.