Butternut squash and some other winter squashes don't need any extra support for their fruit, unlike melons (which do need the support of slings to keep from falling off the trellised vines). But I probably wouldn't try trellising squashes that will exceed 10 pounds or so. ... These squash are ready to harvest.

Do you have to trellis butternut squash?

Like all winter squashes, butternut squash ripens on the vine, and it takes weeks — not days — for the fruits to mature. ... It grows on ambitious vines that scramble up to 10 feet. Tendrils on the vines will twist easily around a tomato cage, but if you grow them on a trellis the fruit itself may need support.

Do butternut squash need support?

Supporting Heavy Fruits

Summer squashes and smaller fruited winter squashes such as the acorn squash won't require any additional support. Larger squashes, like the butternut, will. ... The solution is to create a sling for each fruit. A great way to do this is to use a pair of old tights.