Last year when I did Summer Squash (Yellow Crooked Neck) I went with seedlings from "Bonney" that I got at a Walmart. They were 3 to a pot, and grew out to an average of six or eight feet in diameter per hill.
It makes sense to me to space them a bit apart so the roots don't compete but I never thought to raise them up. They're growing on black plastic this year, in hopes of not having anymore weeds in a few more seasons.
This year I'm going right from seeds. I set an entire patch out already, but they got clobbered by weather. A shame too - they were seedlings I started a few weeks ago and were really looking good.
Between a late cold snap, and rain coming down by the bucketful they didn't have much chance. If I hadn't already re-seeded directly outdoors I think I'd try that spacing scheme, but then I can always add a few more later. There's a total of eight hills of them out there, waiting for sprouts to come up.
That same 10' by 50' patch has three hills of zuchini interspersed with them.
Le Revanchist du Finances
There is no such thing as a "STUPID QUESTION"
~ Unless you or I fail to ask it in time...