It's a little too late to be planting tomatoes in S. Fla. Seedlings should be planted around Oct. when it start's cooling off. Our seasons are the opposite of up North. Our season ends in May when the plants wilt from the heat. You might have some luck if you plant cherry tomatoes as they may put out before May.
At the bottom of this page SEARCH for zone 10 tomatoes. You'll find some great stuff starting with this recent post

Here is a link that might be useful: Zone 10 tomatoes

If you plant cherry, grape or jellybean tomatoes you will probably have better luck as mine kept producing a little bit all summer long under shade cloth, granted I'm up in central FL.

Don't add sand to your potting mix. Nematodes infest Florida sandy soil and you will be importing the enemy :-)

I am in the camp of "plant tomatoes any time". When I lived in Naples (Zone 10) I started them in October for the fall season and then put seedlings out again in February for the winter season. True that July August and September are inhospitable for most vegetables.

I just took cuttings from my fall tomatoes because they should bear fruit faster than starting more seeds (which I did in January also). This is new for me but I'm trying something new.

Good luck.

Denise

Thanks for the comments. Here am I thinking it must be time to start, only to hear it is almost over!!!.
I have compost so I can use it and I have MG pot soil. I always use the Bonnie tomatoes at HD or nursery seedlings--look like plants already to me. This time I will use Husky cherry I see at HD. I have Beefsteak Burpee seeds, but since it too late for seeds, they will have to wait until next time
I have never experienced nematodes, maybe I did, just never knew or rot knots....
Anyone heard of Sungold toms?
Aren't there toms that bear in 65 days?
My usual battle is with whiteflies and mites. I blast them until I am tired, and they come back.

Zone10 tomatoes articles were very interesting and relevant.
Thanks a lot, tomorrow I am off to HD to see what I can find.

Thanks a million, always knew I could depend on FlGardening folks.