Is Japanese Kerria known as Japanese rose too. Can u tell me why mine has never bloomed.
Kerria japonica is also known as Japanese rose plant. It is hardy in zones 4-9 so is a tough plant. It can take some shade but prefers a half day of sun. Is yours in full shade? Try pruning it to improve its appearance and increase flowering. Fertilize in spring with a slow release fertilizer.
When and how to transplant a Kerria. Can I do it in Sept.?
You can transplant in the fall when the weather cools a bit, such as October. If you wait till spring, you probably will sacrifice its spring bloom. These articles should help:
https://solanomg.ucanr.edu/files/246185.pdf
https://www.gardeningknowhow.com/ornamental/shrubs/japanese-kerria/growing-japanese-kerria.htm