Fiddle leaf fig soil?

Just use any good potting soil. It should be fast draining, so you might want to add some vermiculite to lighten up the mix. This plant is a good candidate for self-watering pots, as they like to be kept moist but not soggy. They like bright light and humid conditions - difficult to replicate in the average home - so you can mist it with warm water in a spray bottle. Turn it regularly so it will grow evenly and not reach towards the light.

In Bastrop Texas;

Last year 2013 in February I planted eight fig tree cuttings now 20" tall (watered them moist but never soggy.

To winterize during freezes - I water them once a week when it's 60 degrees - one day previous to a cold freeze.

The moist soil protects the plants from freezing cold weather. Today is March 2014 - they are still having green small bulbs at the end of the bare branches. I have not covered them with anything and they have survived several bitter freezes.

I've had mine so many years I can't remember. Probably more than twenty. I always used plain potting soil mixed with a tiny amount of sand and perlite. Add some broken pieces of clay pots or rock to the bottom of the new pot first to keep the drainage hole from clogging up. Mine got so big I had to take him out and plant him out in the front yard. He likes it out there but every year I have to find new ways of covering him up when it gets real cold outside. If it gets real cold where you live, move him away from any cold windows as they hate coldness and will freeze.

Regular potting soil. Drainage is more important.