Peltandra undulata (accepted name Peltandra virginica), known as green arrow arum, is a bold marginal plant with long, glossy, arrow-shaped leaves. In early summer it carries narrow green spathes with wavy pale edges, followed by round green berries.

Green arrow arum at a glance

Botanical name Peltandra virginica (syn. Peltandra undulata)
Common name Green arrow arum, arrow arum
Plant type Clump-forming perennial; dies back in winter
Height and spread Up to about 1 m tall, up to 50 cm wide
Flowers Narrow green spathe with a wavy pale edge, early summer, then green berries
Position Full sun or part shade
Soil Wet loam; any pH
Pond depth Up to 20 cm of water over the crown (one nursery suggests 5–10 cm)
Hardiness RHS H6 – hardy in a very cold winter (-20 to -15°C)
Native to Eastern North America (not UK native)

Where to plant green arrow arum

  • A pond shelf or basket with up to 20 cm of water over the crown
  • Permanently wet soil at the pond edge
  • Full sun or part shade

How to plant and care for it

Plant in an aquatic basket in spring. The RHS calls it vigorous and says it may need regular division in small gardens. It is generally free of pests and diseases.

Is it poisonous?

Yes. The leaves contain calcium oxalate and are toxic raw, so do not eat any part of it and keep pets away.

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.

Pond depth: 0 - 20cm

Light: Full sun or part shade

Hardiness: Hardy

Height and spread: 80 - 120cm tall, 30 - 50cm wide

Planting and flowering months are shown in the calendar under the photos.

Bare root (7 cm, 9 cm, 1 litre, 3 litre): plants sent without a pot or compost, ready to plant straight away. The most economical way to plant a group.

Potted (9 cm, 1 litre, 3 litre): plants growing in our recycled, peat-free compost made in Lincolnshire. Larger sizes give a faster display.

Pack of 3 (7 cm bare-root, 9 cm bare-root, 1 litre bare-root, 3 litre bare-root): three plants of the chosen size at a lower price per plant.

2x Pot & Compost: two plants supplied with pots and compost.

Sizes shown with a line through them are currently unavailable.

At Lincs Plants, we strive to provide fast and reliable shipping to ensure your plants arrive in perfect condition. We offer 1-3 day shipping through a variety of dispatch methods to suit your needs.

Processing Time:
Orders are processed within 1 - 3 business day after payment confirmation. Orders placed on weekends or public holidays will be processed the next business day.

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