Malia, do not replace the soil with any other soil . Jack fruit grow well in Florida in your native soil in most areas.
Dig at least 3 ft down by 3-4 ft wide square hole.
Plant the jackfruit.
Back fill only with the soil you dug out.
After planting mulch on top with woodchips and or grass clippings / leaves. Keep this material 8 inches or so from the trunk of your plant.
If you want you can also put a layer of compost 8 -inches or so away from the trunk directly around the tree
Water well with a hose
Fertilize in spring and maybe late summer
Mike
