Not early on. Most winter squash are vining, while summer squash in general have bushy plants. There are of course several bush winter types. And there are winter types like the Trombocino which is mostly used as an immature summer squash. Knowing which varieties you planted would help.

Agree that narrowing the choices by telling us which varieties you planted would help. Meanwhile the shape of the little squash on the female blossom could give you some clues.

And, assuming you aren't planning to save seeds, cross-pollinating them by hand will still get you the various squash this year and won't hurt any thing. It happens all the time naturally and only affects the seeds, not the fruit.

Dave

Oh thank you Dave!! that's all I care about, that I don't get mutated squash. Also, thanks for the tip rE: the shape.

I planted the crookneck summer squash, I think, and butternut squash for winter squash. Typical burpee variety.