The Q&A Archives: Transplating Hostas & Delphiniums in the Fall

Question: It is mid-October in Ohio. Is it a bad time to transplant hostas? I have planted them too close to each other and need to move them. Also, I have finally been able to grow my favorite flower of all time - Delphiniums. I read somewhere that they need lots of space around them for air and they have multiplied and are quite prolific in one area of my yard. Should I transplant them and is this an OK time to do it? Both plants I mentioned are facing the North and we have harsh winters with lots of wind and have an open field directly across from our home where the plants are. Thanks for any help you can give me.

Answer: It would have been better to move them in September so they would have more time to become re-rooted. The rule of thumb is to allow eight weeks before the ground freezes. So in my experience it is a bit late. Hostas are actually best divided and transplanted in early spring just as they begin to emerge. Delphiniums are very difficult to transplant successfully once they have any size, but small seedlings can be moved in the spring. I would recommend waiting until spring to move these, too.

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