When and how to transplant perennials?

I don't like how I currently have my perennial placed in my garden, so I'm wondering, should I wait until fall to move them or in spring? Also, I've never bought plants at the end of summer, but am wondering if nurseries put the perennials on sale at that time and if it is OK to plant perennials at the end of the summer. (I live in Colorado- not sure what zone that is.).

Answers:
Most perennials should be divided or moved in the fall but it can also be done in the spring. Best when the weather is cool and rainy. When you move them to their final location make sure to keep them well watered until they are established. If you are in a cold climate and you are going to do it in the fall make sure that it is early enough that the plant has time to get a good hold before the bad weather sets in.

Other answers:
Your plants can be moved or spilt at any time if the year. At least I do mine and so far so good. I have only perennial and herbs. Just be careful with them and you can do it any time.
Your plants can be moved or spilt at any time if the year. At least I do mine and so far so good. I have only perennial and herbs. Just be careful with them and you can do it any time.
well im not exactly sure but my dad is a landsaper
u can move them like in may and june
which is probly the best time
and when there are dead flowers
u pick them off and more of them would grow
and its healthy for the flower
It depends on the plant. Rule of thumb is divide and transplant spring flowering in the fall (mid sep - mid oct) and summer and fall flowering in the spring (mid april-mid may) Colorado is mostly zone 5, though might be zone 4 in the mountains
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