Description
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.
