Crotons unplanted with ferns.

Monica Brandies has a good book on shade gardening. For problem shade areas she lists
cast iron plant, bromeliads, liriope, ivies, mondo, prayer plant, several ferns, kaffir lilies and others. She also list spider plants, wandering jew, mother in laws tongue--but these are or can be invasives
It's a good book, worth checking out.

Bill

I agree with both of the above. Ferns are always a good choice for deep shade. Also, there are many "house plants" that will do well in shade outside in warm areas. Everything from various philodendrons to pepperomias. I have grown both with good success in shade areas. I particularly like pepperomias for a nice change in leaf texture. Just remember that the plants under the soffit will not get much rain, so might need extra watering.

Good luck!

Marcia

There are also some great flowering gingers; such as Kaempferias and Globbas with a few cold hardy Alpinias such as Alpinia Japonica. I use these gingers extensively under my live oaks. Also, Phaius Tankervillae, Nun's Orchid does well in the shade.

Steve

What about Ferns in particular? What ones do well here in central Florida and grow to a respectable size? around 2 1/2 to 3ft

Caladiums, ferns hosta's, dracaena,

You have the perfect garden conditions for some wonderful plants that include color with foliage, like

Calatheas (there is a large variety of these on the market)

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Aroids, like Alocasias and Philodendrons

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Tacca Nivea, loves deep shade

I try many of these plants in different conditions, including deep shade. They can take some sun as well, as your conditions are described. Regular watering will be needed, however.

Martina