as a gardener with a small backyard, i believe in trellises. instead of sprawling cantaloupe & watermelon vines throughout the yard, my melons grow up a homemade trellis made from bamboo & thick twine.
at first i was hesitant, though. i thought that maybe the melons would grow to be too heavy for the trellis, hanging in mid air & snapping from the vine before fully ripening. this has not been the case for this year's melons.
they are growing healthfully & happily. using what i had, (in this case a thin, stained kitchen towel did the trick) i tied the watermelon to the trellis. this allows for more support for the vine & trellis. i have also used plastic produce bags & have heard of others using old panty hoses.
whatever you might choose to use, i think you will really enjoying this space-saving trick. i am convinced that this will be my only way of growing melons in my little backyard, and perhaps pumpkins, too.