Its going to rain this weekend. So the soil wont fall away from the roots.
Dig a hole the size it needs to be.
Carefully insert a sharp spade around the plant. Lift without disturbing the roots - you may need some help with this- and carry to the new location.

ok thanks Diane I'll give that a go :)

If you mean Phlox paniculata? I have a great many and I would not moved them in high summer even if it is wet, a few hot days and they may well not survive.

Agree with Drc not the time to move them.

thanks for the replies Drc and Mg :)

but if you have no choice then as advised in the first post.

Thankyou Seaburn, im going to do exactly that if they die, they die!!