Soft fields in Florida?

Look at your sectional. Airports shown by a blank circle will very likely be turf runways. For example, X49 (South Lakeland, east of Tampa) is turf, 3100 feet. X61 (White, northwest of Orlando) is also turf, 3300 feet. And, if I may say so without giving offense -- shame on you for asking such a question! When looking for airports, start with the sectional and the AFD. Of course!

Doubtful you're going to find a grass or dirt strip longer than 3000 ft, but some airports will allow you to land on the infield grass next to their paved runway. Check with the tower or airport management before you try it.

Years ago I did some PPL training out of a small field within a few miles of Lakeland Linder municipal airport. It was alongside H69 at Mulberry, a suburb of Lakeland. I think it was referrred to as X49.

i would think your instructor could point you at a suitable field. as a ppl student the school won't let me land solo at the nearest grass airport (cyhe), but i can use the grass runway at cynj (07a/25a) once my instructor has checked me out on it.

later: the preferred runway at cynj, 01/19, is 2100 feet long. if you can land on that, you can land on anything. :-)

the biggest airplanes you usually see at the airport are light twins, senecas and 310s.

Are you sure your school aircraft are insured to operate off pavement? Most are not.

Then they probably won't let you land on grass either.