I was thinking maybe a pumpkin mix also, just by looking at it. I love the bamboo trellis, and I sure wish I had lots and lots of bamboo. I am not sure how many squash you have, or how big they will get, but when I was first looking up trellising cantaloupes, it said to place the young melon in a stocking and tie the stalking to the trellis. The stocking then grows (stretches) with the growth of the melon. Maybe this could work for you, or give you an idea.... good luck. Would like to see it as it progresses.