All in Soil of Faith

Do we work the soil of our faith, not just till it, but work into it fresh compost, leaves, and other nutrients? Do we dig out the rock that lies just beneath the surface, and make rich, deep, soil out of what once was shallow and of little use? If the seeds of faith are to mature, and thrive, they must have good soil to support their roots. So how deep was the soil beneath us when we first believed, and is it fertile enough to support the roots of our growing faith? Are we working as much on the soil beneath us as we are in the planting of the seeds we want to grow?