Great htread applestar! These are the kinds of things we should all be looking at but somewhere along the way it has gotten out of people's blood for the most part. Any of the old farmers in my area will have similar clues as to when to do things. And every year there is a part of me that thinks "silly old man, I've had my tomatoes in the ground for a month and they're just fine and he's just putting his in" and every year theirs sail past mine seemingly over night. Sometimes I swear they go out in the middle of the night and dig up the small plants and replace with bigger ones from walmart lol.
I don't know if this is what you want or if you are looking for personal experiences only. But this is from the "old farmer's almanac"
# Plant corn and beans when elm leaves are the size of a squirrelÃ¢â‚¬â„¢s ear, when oak leaves are the size of a mouseÃ¢â‚¬â„¢s ear, when apple blossoms begin to fall, or when dogwoods are in full bloom.
# Plant lettuce, spinach, peas, broccoli and cabbage when the lilacs show their first leaves or when daffodils begin to bloom.
# Plant tomatoes, early corn and peppers when dogwoods are in peak bloom or when daylilies start to bloom.
# Plant cucumbers and squash when lilac flowers fade.
# Plant potatoes when the first dandelion blooms.
# Plant beets and carrots when dandelions are blooming (good succession planting plan, too).
# Plant peas when the forsythia blooms.