Pruning Japanese forest grass 'Aureola'
When and how — Hakonechloa macra 'Aureola'
Prune your japanese forest grass 'Aureola' in March and April — the optimal month is usually April.
The next pruning window is March next year.
When to prune?
The perennial japanese forest grass 'Aureola' is pruned in March and April.
With perennials, pruning is really seasonal management.
You don't prune perennials the way you prune shrubs. The work happens at three moments: (1) deadheading spent flower stems during the season to encourage repeat bloom, (2) optionally cutting back to about 10–15 cm above ground in late autumn, and (3) clearing all the old foliage in March before the new shoots emerge. Many gardeners now deliberately leave the old growth standing through winter — it protects the crown and shelters overwintering insects. Which approach to choose depends on taste and species: evergreen perennials (hellebore, bergenia) look better left alone, while wet-rotting species (hosta) need to come down after the first frost.
How to prune japanese forest grass 'Aureola'
Hakonechloa macra 'Aureola' requires minimal pruning, but an annual tidy-up keeps it looking its best. The foliage dies back naturally over winter, turning attractive shades of pink and bronze before fading to buff. You can leave the dried leaves standing through winter for structural interest and to provide shelter for overwintering insects, or cut them back in late autumn if you prefer a tidier appearance. The main pruning task falls in March or April, just before new growth emerges. Using sharp secateurs or garden shears, cut back all the old foliage to within 5–8 cm of the ground. Work through the clump systematically, gathering handfuls of dead leaves and cutting them away cleanly. This can be done in one session as the grass forms a relatively compact mound. Wear gloves if you find the dried leaves irritating to handle. Remove all the cut material to the compost heap—it breaks down readily. Timing matters: prune too early in winter and you remove protection from the crown during hard frosts; leave it too late in spring and you risk damaging the fresh new shoots emerging from the base. If you notice any frost-damaged or tatty foliage during the growing season, simply snip it out at the base with secateurs. Hakonechloa doesn't produce significant flowers that need deadheading—the late-summer blooms are subtle green spikelets that fade naturally and don't detract from the foliage display. Mature clumps can be divided during the spring pruning session if they've outgrown their space or lost vigour in the centre.
Common mistakes
✗ Cutting back too early in spring
Late frost can still strike and the old foliage protects the crown. Wait until the first new shoots are visible (usually mid-March) — then you know the season has actually started.
✗ Skipping deadheading
Hardy geranium, salvia, lupin and delphinium will give a second flush if you cut spent stems back to just above a pair of healthy leaves as soon as the first flowers fade.
✗ Cutting ornamental grasses down in autumn
The dry stems are the whole point of winter interest, AND they protect the crown from frost and waterlogging. Cut down to a fist's height only in late February.
Combine with feeding
In April you can combine pruning with feeding — efficient, and you only disturb the plant once. Read the full care guide for japanese forest grass 'Aureola' →
Too late this year? Here's what to do
Better to wait than prune at the wrong moment. The next optimal window is March next year. Until then: leave the plant alone — only remove dead or diseased wood (which you can do year-round).
