I have a 15 gallon dwarf meyer lemon that I want to transplant from the potting mix that came with the tree to a CHC / Coir mix. What is the best way to get roots cleaned of the old potting mix without damaging them? How aggressive should I be in getting them clean? Finally, the tree is currently in bloom. I presume I should wait until it is done fruiting before I attempt to transplant. It is indoors in a very sunny window location in the lake Tahoe region, and I am hoping that it will continue its bloom and produce fruit.