I plan to divide hostas in my back wooded area this fall. When is the best time to do that project? Thanks for you help.
Washington County Minnesota
Thanks for the question.
The preferable time to divide hostas is in early spring once the ground can be worked. Early fall (September) is another window of time though subsequent survival is less than if you were to wait until spring 2020. In both cases, you want to provide sufficient time and suitable environmental conditions so that the newly planted hostas can develop a strong root system. Newly planted hostas in the fall may not have sufficient time to do this before winter. See:
In the following publication there is a link to a great pdf file on when and how to divide a large number of different perennials including hostas: