Its not exactlly digging them up, and its not every one every year, but ALOT. When they are in pots tho, I do gently dump them, try to leave them intact, and fill the bottom of the pot with more mix, then slide the plant back in...water, and hope its knows nothing every happened. In the ground, you do have do dig under the plant, I sometimes do one side then the other, sometimes I just lift it out, kinda like the pot method. Its a good chance to throw in some plantone, or whatever, in with the new mix.
