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A picture of a Bog Arum

Bog Arum

Calla palustris

Also known as

Water Arum, Swamp Lily, Water Dragon, Marsh Calla, Wild Calla, Bog arum

Calla palustris by Aiwok (CC BY-SA 3.0)

Full Sun
Moderate care
Frequent watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size









  • spring
  • summer
  • autumn
  • winter

This plant has a mild fragrance

More images of Bog Arum

A close up of a white Calla palustris flower with green leaves
A close up of two white Calla palustris flower with green leaves
Some Calla palustris plants with white flowers and green leaves
A close up of a Calla palustris fruit
A close up of some red Calla palustris fruit

Bog Arum Overview

Calla palustris is a hardy, deciduous, rhizomatous, aquatic, perennial plant from cool temperate climates in Europe, North Asia and North America. It is commonly known by the names Bog Arum, Water Arum and Marsh Calla, amongst others. Water Arum grows in ponds and boggy land and tends to spread, making it a good marginal plant for the edges of water bodies. It grows best in full sun. The foliage is attractive and it produces small, clustered flowers, surrounded by showy white spathes. Bog Arum has been cultivated to exhibit a range of colours including black, pinks, purples, yellows, oranges and striated bicoloured forms. Historically it was used as a medicine for swelling, snakebites and soreness.

How to propagate Bog Arum



Special features of Bog Arum

Attractive flowers

Attractive leaves

Other uses of Bog Arum

Water plant. Whole plant is poisonous if eaten.


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