Beginner Gardening: so many squash, 0 by lindasch100

lindasch100 wrote:
this is a follow-up to post "Is this a lemon cucumber?". It wasn't. I planted spaghetti squash, some from seed, some plants from the nursery, and some from a community college sale. I love spaghetti squash and had NO idea how enthusiastic these plants would be. And I have squash: some cream-yellow like any self-respecting spaghetti squash is, some light green (not just immature), some dark green, some green striped and some are round. All mixed up in my squash patch. I harvested a striped green one (the one pictured in the lemon cucumber post). It seemed to have stopped growing, it sure looks like a spaghetti squash inside, and tasts like it too, but it was very immature. A baby.
What is going on here?
And how do I know when to harvest the green ones? Do they need direct sunlight to mature, cause the leaves are so abundant that the squash are always in shadow.
First picture is a squash that is BIG, then pictured is my variety.
Linda