Depends where. Sun portion of the garden could be tough. Shady one with lots of watering is fine but generally I wait to) September to do major upheavals if I did not do spring. I am lazy that way.

big city location.. zone is simply minimum winter temp ... so it doesnt tell us much in your area the rest of the year ... z6 is rather diverse ...

as far as them living.. you can do it any time..the only downside might be how ugly they look the rest of the year.. if you hack them up ..

moving a whole clump .. water it well for a week.. then just move it.. and drown it again ... and probably will look just fine the rest of the year ..

hmmm.. that reminds me.. there was a brilliant post on this topic.. wonder if i can find it.. lol ..

if you are cutting it up ... it depends how far you go with that process ... if in half.. or even quarters.. on a lagre plant ... probably take it well ...

if you are going down to small pieces.. then your goal is nice clumps next year.. and you shouldnt really care about what they look like the rest of this year ....

just do it .. if need be .. or wait.. really .. its your choice

ken

note the tape trick ... it really helps

https://www.houzz.com/discussions/2000608/moving-a-large-fully-leafed-out-hosta-lots-o-pix

In humid muggy Northern Virginia, inside the beltway.

I can attest to the method noted by Ken and the tape——I followed them last summer to break up one of my June’s which was reverting to Halcyon. I followed ken’s method and came out with two hostas, June and a Halcyon, which is a very nice blue.

Give yourself an afternoon (or morning) and just do it!

debra

Too late for what result? Will they survive to tell a pretty tale NEXT YEAR--yes. Will they look like they were trashed for the rest of this year--probably. I never let that stop me. When I have the time, I have the time..Ken's method is your best chance at looking fine this year. Worked great when I was 40 something..now that 60 hit and the neighbors want me to share...I find his method not physically possible...but the sections I give I know will live!!