I'll bet that whenever you move them you're going to need more than a trowel. I get the dh and his sharpshooter shovel to get underneath most of the bulbs that I attempt to move. Those big crinums almost bent the shovel trying to get them out...'course daffs and other bulbs are easier, but can still be challenging. I've never worried too much about roots when digging deep under the bulb like that, though. Difficult to hurt most bulbs unless you chop through them...Yep, done that, too, lol!