transplanting rebloomers question
I'm planning on rearranging my garden and so will have to move six reblooming irises. None of them bloomed this spring (though several of them had scapes coming at frost time last year about three months after planting). Since I've not seen them bloom yet, I really don't want to set them back and lose a year with a rough transplant....So the question is when can I move them and can it be accomplished without shocking them? I've heard you can dig a hole under them and move the whole dirt ball. Is this effective? If so, how far down do the roots go; i.e., how far down should I dig?
I'd really like to see a few blooms this fall. Thanks for your suggestions.