Divide the clumps into sections of at least 10 fans each (larger divisions transplant more successfully), keeping the root masses submerged in a bucket of water until you get them replanted. Sib roots must not be allowed to dry out while out of the ground. Replant as soon as possible, mulch heavily with pine needles, and water daily for the rest of this growing season.

Don't worry about the direction of the fans. Sibs grow in circular clumps, unlike the wandering LAs. Sibs do prefer acidic, well-drained soil and full sun.

Laurie

Good advice from Laurie. I've found Siberians to be one of the most reliable and durable plants... mine have been blooming and expanding for 35 years. I lift them to weed, divide, etc. just about any time they need it. One thing I don't do, though, is mulch. You've got an extra hardiness zone or two on us here in the Northland and your Siberians should have plenty of time to settle into their new location.