I just do it that way the way I do because I have failed all the other ways ,,, This one I do is best for me , the bend on the back of the jug has to be just right or they won't stay closed properly , tornadoes and high winds will get one once in a while ,, dogs cats 101 critters , but mostly things I can grow here grow anyway ,,
luvsgrtdanes best to do it the way all the gardeners show it done ,, you will find the perfect for you
Best of luck with the planting ,,,
