Japanese anemone: planting, pruning and care advice

Updated on 22 September 2026Published on 29 January 2020

Slender stems bow to the first autumn gales, topped with pink, red or white flowers above elegantly contoured, deep green leaves. Japanese anemone (Anemone japonica) carries perennial beds from the end of summer to the first frosts; give it light, well drained soil and sun without fierce heat, and it flowers freely year after year.

Japanese anemone at a glance
Name	Anemone japonica
Family	Ranunculaceae
Type	Tuberous perennial
Height	5 to 12 inches (5 to 30 cm)
Exposure	Full sun, part sun
Soil	Ordinary, well drained
Flowering	Late summer to mid-autumn

Care, from planting to blooming, is easy and the ornamental impact is guaranteed.

Planting Japanese anemone

Planting Japanese anemone requires light and well drained soil, sun but not too much heat which would tend to burn the leaves.

Pink japanese anemones with white fringes — Late flowers come in pink, red or white

From tubers, plant in fall at a depth of 4 inches (10 cm).
Planting also possible in spring if you’re able to water more regularly at the beginning.
Keep a depth of at least 3 inches (7-8 cm) and space tubers around 24 to 32 inches (60 to 80 cm) apart.
Propagate through crown division at the beginning of spring or just before winter.
Look up our advice on dividing perennials.

Four ways to start and increase Japanese anemone

Japanese anemone can be started from tubers at two different moments, or increased from the plants you already have. The table sets out what each route asks of you.

Four ways to start and increase Japanese anemone
Method	When	How	Point to watch
Tubers in autumn	Early to mid-autumn	Plant the tubers 4 in (10 cm) deep	Main planting time
Tubers in spring	Early to mid-spring	Alternative to autumn planting	Water more regularly at the beginning
Crown division	Early spring or early winter	Divide the crown of established clumps	Follow the usual advice for dividing perennials
Self-sown seed	Seeds left to ripen before early winter	Leave a few flowers on the plant instead of deadheading	New sprouts appear in spring

Whichever route you choose, the soil must stay light and well drained.

Pruning and caring for Japanese anemone

You must remove wilted flowers regularly (deadheading) in order to boost flower-bearing.

Before winter, let a few flowers ripen into seeds so that you’ll have new sprouts in spring.

Japanese anemone abominates powdery mildew, that white powder that covers the leaves.

If that’s the case, read our techniques to fight against powdery mildew.

Learn more about Japanese anemone

White japanese anemones in a field — Taller types belong at the back of perennial beds

Japanese anemone is one of the cutest flowers to bloom in fall. Slender and elegant, it bows to the caress of the first autumn gales and decorates our gardens and decks from the end of summer up to the first frost spells.

They are perfect towards the back of perennial beds for the taller species, or along edges and in rocky ground for smaller ones.

Sometimes invasive because it is self-sowing, you won’t have any trouble restraining its growth.

Its late flowering is magnificent, and their flowers are usually pink, red or white.
Its leaves, elegantly contoured, offer flower bouquets a nice touch of deep green.

Frequently Asked Questions

Is Japanese anemone poisonous?

Yes, the plant is poisonous, so take care where children play around it. Site it away from paths and play areas, and wash your hands after dividing or deadheading. It is fine as a garden or cut flower as long as nobody is tempted to chew it.

When does Japanese anemone flower?

Flowering runs from the end of summer right up to the first frost spells, which makes it one of the best perennials for late colour. The slender stems bow to the caress of the first autumn gales without losing their elegance. Deadheading the wilted flowers regularly keeps more buds coming.

Is Japanese anemone invasive?

It can be somewhat invasive because it self-sows freely, but you won’t have any trouble restraining its growth. Removing the wilted flowers before they set seed is the simplest brake. Leave just a few flowers to ripen if you do want new sprouts the following spring.

Why are the leaves of my Japanese anemone covered in white powder?

That white powder on the leaves is powdery mildew, a disease this plant particularly suffers from. Planting in light, well drained soil where the sun is not too fierce helps, since excessive heat also burns the leaves. Treat affected plants with the usual remedies against powdery mildew.

Smart tip about Japanese anemone

Watch out if you have children around because this plant is poisonous.

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.

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