I recently purchased a ficus tree bonsai...a New England Bonsai Tree. It was in a very small pot. Wiring secured the 18" high tree through the drain holes in the pottery. I want to trim the roots and replant in a larger pot. The problem is the soil is compacted and hard as a rock. I soaked the soil for two hours, but it did not soften at all. Has any one dealt with a root bound bonsai like this? What is the best way to get to the roots for a trim and then repotting. Thanks for any help you can provide.