The best times to divide hostas are either in early spring as the new growth (buds or "noses") starts to emerge, or in early autumn when the growth begins to slow down.
- Dividing in spring allows the hostas to root and put on new growth during the same year.
- Autumn divisions often require less watering as the plants are preparing for dormancy.
- If divided in late summer, mulching is recommended to protect the new divisions through winter.
- Avoid dividing in winter when the ground is frozen and the plants won't grow immediately.
- When dividing, each section should have at least two or three shoots ("eyes") and a good portion of roots.
- Hostas can be divided regularly depending on the variety; vigorous types can be divided multiple times a year, while slower-growing types need more recovery time.
- After dividing, it's important to water well, especially if done in warmer months.
In summary, spring as the leaves emerge or early autumn are the ideal times to divide hostas for best results.
