I've never bothered with a fall garden before, unless you count turnips. Usually by this time of year my garden is covered with weeds, and I don't particularly care.
For some reason, I've kept most of the weeds pulled this year, although at times they got ahead of me. I decided to try planting some things at different times than usual. Because of this, I managed to keep a zucchini plant alive for a record two months, and it's still out there, although it's looking a little bedraggled.
It's tradition to plant turnips on "the 25th of July, wet or dry".
Some of these late-planted things may not develop in time to escape frost, but it's a learning experience for me. I've also planted beets, and I would have loved to plant some carrots. But nobody has any seed for sale at this time of year. The only place I know to get them is thirty miles away, and I can't justify our driving that far to buy a dollar's worth of seed that likely wouldn't produce for me.
I've had three plantings of sweet corn that failed this year, and two plantings that did well. I think perhaps the trick here is to water thoroughly after planting the seeds. Next year I'll find out.