When can I transplant Japanese lilies

Question

They are over growing the spot they are in

Answer 1

Like most bulb type flowers, lilies should be divided and transplanted in the fall. The timing often depends on your growing/ hardiness zone.

Here are a few articles to help with growing your lilies:

https://www.gardeningknowhow.com/ornamental/bulbs/lily/dividing-lily-plants.htm

https://www.gardeningknowhow.com/ornamental/bulbs/lily/lily-transplanting.htm