Acorus gramineus 'Pusillus' - Dwarf Slender Sweet Flag, Pond Marginal Plant
Acorus gramineus 'Pusillus' - Dwarf Slender Sweet Flag, Pond Marginal Plant
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Acorus gramineus 'Pusillus' (now listed as Acorus gramineus var. pusillus), known as dwarf slender sweet flag, is a very small form of slender sweet flag. It forms tight, slowly spreading fans of narrow, grassy, mid-green leaves that stay semi-evergreen.
Dwarf slender sweet flag at a glance
| Botanical name | Acorus gramineus var. pusillus (syn. A. gramineus 'Pusillus') |
|---|---|
| Common name | Dwarf slender sweet flag, dwarf Japanese rush |
| Plant type | Semi-evergreen, slowly spreading clump |
| Height and spread | About 10–20 cm tall, spreading slowly |
| Flowers | Insignificant; grown for its foliage |
| Position | Full sun |
| Soil | Wet or very moist, fertile soil |
| Pond depth | Wet soil or very shallow water around the roots |
| Hardiness | RHS H6 – hardy in a very cold winter (-20 to -15°C) (species rating) |
| Native to | Eastern Himalayas to Japan and the Philippines (not UK native) |
Where to plant it
- The very shallow edge of a small pond
- Container ponds and wet soil
- Full sun
How to plant and care for it
Plant in wet, fertile soil or in a basket in very shallow water. The RHS describes the species as generally free of pests and diseases.
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.
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