I agree with Dutch Lady to avoid buying Cypress mulch. Most of these trees are harvested in a non sustainable way. Land is bought, trees cut down and the area left bare, or used for something other than replanting the trees.
Do your homework on potting mixes. As a Master Gardener here in central Florida we don't recommend Miracle Gro.
I have no more room in the ground for planting trees, so I now have a Key Lime and Persian Lime in very large pots on one of the decks. There are both loaded with fruit and I actually made my first key lime pie a couple of weeks go. So good. Will be making another one this coming week.