Lots of people have been talking about the possibility of a fall garden. Here is a chart that I have posted on the inside of my pantry (it was created by an Arkansan extension agent).
The inside of the wheel is the first of the month, the outer would be the end of the month.
Because it is a bit difficult to read, I've listed below what you can plant.
August
basil (first of the month)
lettuce
mustard greens
kale
carrots
parsnips
chinese cabbage
beets
broccoli
cauliflower
collards
cucumber
cabbage
southern peas
snap beans
spinach (at the end of the month)
September
bok choi (first of the month)
pak choi
parsnips
swiss chard
carrots
spinach
beets
cauliflower
kohlrabi
collards
broccoli
cabbage
turnips
mustard
kale
lettuce
radish (end of the month)
October
cover crops (I planted wheat last year)
winter peas
lettuce
shallots
garlic
leeks
collards
kohlrabi
mustard
spinach
turnips
November
garlic, shallots
lime the soil
(protected because frost is near!)
salad greens
lettuce in cold frame
turnips
collards
turn the soil
cover crops