Cut hostas back in autumn, once the leaves have yellowed and flopped after the first frosts, usually around October to November. There is a good reason not to leave it until spring: clearing away the dead foliage also removes the slug and snail eggs that shelter in it over winter.
It is a quick job and one of the most useful things you can do for next year's display. Here is how and why.
Why cut hostas back in autumn
Unlike ornamental grasses, hosta foliage does not hold any winter interest. Once frost hits, the leaves collapse into a soggy, yellow heap that sits over the crown. Left in place, this mush is the perfect overwintering habitat for slugs and their eggs, which then emerge hungry in spring just as the new shoots unfurl. Removing it is one of the single most effective steps in looking after hostas.
When exactly to do it
Wait until the leaves have naturally yellowed and started to die down, which usually follows the first frosts in October or November. Cutting back while the foliage is still green removes energy the plant is trying to draw back into the crown, so let it fade first, then cut.
How to cut hostas back
- Once the leaves have collapsed and yellowed, cut all the foliage back to around 5cm above the crown.
- Clear away and bin every scrap of dead leaf, do not leave it lying on the soil.
- A light mulch around, but not over, the crown protects it through the coldest weeks.
That is all there is to it. The crown sits dormant through winter and pushes up fresh eyes in spring. While you are there, autumn is also a fine time to lift and split congested clumps, see our guide on when to divide hostas.
Browse our full range of hostas, from bold blues to bright variegated forms, and pair them with hardy ferns for a lush shade and woodland border.