Everyone i know has a problem controlling weeds, and the constant bending and pulling can have a very bad effect on your back so here are some simple all organic weed zappers!
Salt! Pour rock salt on a pesky weed and watch it shrivel to nothing...
Vinegar! Mix half vinegar and half water and put in a spray bottle! spray those nasty suckers..
Boiling water! In some cases boiling water poured on a weed patch can knock them out! also use this on ant hills...
Rubbing alcohol! Put some in a spray bottle and spray the weeds (only weeds this will kill all). i advise not using this where the plant near spraying will be eaten. (great for flower patches)
or for the real pesky sons a... use a mixture.. part coke (yes the soda), vinegar, water, and dish soap. Shake it up in a spray bottle and start spraying all weeds!
For all these methods try to pick a day where its not going to rain. I understand this is Florida so even though the weather says no rain it still may rain but... try.