I don't know much about your climate, but it all depends on how cold your winter gets and how far along into winter you are. If the temperatures stay mild, you can do all your cole crops, lettuce, carrots, radishes and plant garlic and onions for spring harvesting.

You may need to start from transplants, but this is only if you can get them in and mature before a hard freeze....if you even have hard freezes.

I'm in GA and we're expecing our first hard freeze Saturday. I'm pulling my broccoli and lettuce tonight.

The best thing you can do is find a planting schedule for your area. According to the Arbor Day zone finder you're zone 9 (a helpful piece of info to put in your profile ~ helps others answer your questions better). So you could find something that lists what and when to plant in zone 9, but every zone 9 is different, so a schedule specifically for your area would be much better. Try your agriculture extension service website.

I'm in zone 8b (a bit cooler than you) and here's what I'd do in your situation ~ I'd rip out everything and replant with cold tolerant veggies. Even if I tried to keep those tomatoes going, their production would slow to a crawl, so much that it wouldn't be worth the heroic measures I'd have to take to keep them going (building a structure to hold plastic and row cover, being sure to vent it on a hot day and cover it back up on cold ones, finding a way to water it when it's covered, etc. ~ a real pita). And it'd eventually get killed by a humdinger of a freeze anyway. It'd be much better to just rip it out now and plant something that can take the cold.

Here's the list of what's in my garden right now (so would be things I'd pick to replant the square foot bed with of course):
lettuce
snow peas
all the coles (broccoli, cauliflower, Brussels sprouts, kale, cabbage and collards)
mustard greens (including spinach mustard)
bok choi
tatsoi
other Asian greens
Swiss chard
spinach
garlic
beets
flowering sweet peas
dill
cilantro
artichokes

I know I'm forgetting something else...

I'm a little cooler than you too. Right now I have onions, lots of onions, lettuce, radishes & spinach. I'll stick some cabbage out there before long.

JD - I'm in the same boat as you. Here's the local planting info I found from the UC Cooperative Extension, Los Angeles County. Hope this helps.

Nancy

Here is a link that might be useful: LA County Garden Tips