They transplant easily. Can do it anytime and the clumps can be divided.

Lycopus is correct. Just be aware that usually they go dormant in the summer, you will have a bare patch thru the summer months. Mine are almost gone now.

Mine just finished blooming about a week ago and are working on producing fruit. If not overly hot and dry, they last about half way through the summer here so how long they are visible in your woodland garden is very location dependent.

Give the mayapple enough room to spread into a nice round colony. They look the best and grow most happily in large groups.

FataMorgana

Thanks for the info guys! I'm still not clear on when is the best time to transplant!

T.J.