How are 2 liter bottles used to grow plants ?
I found a page on this forum where someone was explaining how to cut 2 liter soda water bottles and use them to grow plants. I can not located the page, but the discussion was all about how to cut the bottles and put them back together. the discussion did not cover in any detail as what they were used for.
My questions are:
Â How are they used ?
Â What advantages do they offer ?
I am new at plants and am trying to learn how to root cuttings.