One rather suspects…
…that one’s butternut-squash are potentially not butternut-squash, but some other form of pumpkin thingee.
You can make up your own mind though.
The plants definitely had a butternut-squash label attached, so I guess either someone took great delight swapping labels around, or the plants and/or seeds somehow mistakenly got mixed up. Or there’s some really weird cross pollination happening with the radishes. But hey-ho. At least they’re growing!