Acorus gramineus 'Variegatus' - Japanese Sweet Flag, Pond Marginal Pla

Acorus gramineus 'Variegatus', known as variegated Japanese sweet flag, forms compact fans of narrow, arching, scented leaves. The RHS describes them as green with creamy-yellow edges. It is grown for its leaves, as the flowers are insignificant.

Variegated sweet flag at a glance

Botanical name	Acorus gramineus 'Variegatus'
Common name	Variegated Japanese sweet flag
Plant type	Compact, semi-evergreen, grass-like perennial
Height and spread	About 25–30 cm tall, about 35 cm wide
Flowers	Insignificant; grown for its leaves
Position	Full sun, sheltered
Soil	Wet or very moist, fertile soil; any pH
Pond depth	0–5 cm of water
Hardiness	RHS H6 – hardy in a very cold winter (-20 to -15°C)
Native to	East Asia (not UK native)

Where to plant it

The shallow edge of a pond, up to 5 cm deep
The edges of small ponds, where its compact size suits
Bog gardens and wet borders in sun

How to plant and care for it

Plant from spring to late summer in a sunny, sheltered spot. Divide it every few years to stop clumps becoming congested. The RHS notes it can be short-lived where the water stays above 22°C for long periods.

Is it poisonous?

Not confirmed for this plant, but its relative Acorus calamus contains a toxic compound. Do not eat it and keep pets from chewing it.

Which size should I buy?

Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.