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Summary

Physical Characteristics

Orontium aquaticum is a PERENNIAL growing to 0.5 m (1ft 8in).
See above for USDA hardiness. It is hardy to UK zone 7 and is not frost tender. It is in flower from April to May. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers wet soil and can grow in water.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

Pond; Bog Garden;

Edible Uses

Edible Parts: Root Seed
Edible Uses:

Root - cooked. It must be soaked in cold water for some hours in order to remove an acrid taste[46, 161]. The fresh root contains calcium oxalate and, when eaten raw, will produce an effect on the mouth similar to being pricked with hundreds of small needles. As long as the root is well cooked the calcium oxalate is broken down and the root is perfectly safe to eat[2, 55]. Drying the root also breaks down the calcium oxalate and makes the root safe to eat[105]. The dried roots can also be ground into a powder and used with flour in making bread, biscuits etc[207]. The root is deep seated in the mud and difficult to extract[95]. Seed - dried[1, 95]. The seed must be soaked first in order to remove an acrid taste[46, 55, 161]. Repeated boiling in changes of water are necessary to render the seeds edible[2]. They have a taste like peas[207].

References More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

None known

References More on Medicinal Uses

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Other Uses

None known

Special Uses

Scented Plants

References More on Other Uses

Cultivation details

Succeeds in the bog garden or pond margins up to 45cm deep[56, 200], but plants do less well if they are not grown in water[188]. Requires a fertile loamy soil in full sun[200]. Plant the rootstock in at least 30cm of soil[1]. Another report says that the plant should be under at least 15cm of water[245]. Plants are hardy to -15°c[200] in one report, to -20°c in another[187], though another says they they may require protection in harsh winters[56]. A most unpleasant animal smell is emitted from the flowers[245].

References Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Propagation

Seed - best sown as soon as ripe in submerged containers in a cold frame[188]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in trays of water in the cold frame for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. The seed develops on the plant underwater in small green berries[200]. Division in spring[200]. Very easy, the divisions can be planted out direct into their permanent positions.

Other Names

If available other names are mentioned here

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Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so itâ€™s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants

Latin Name	Common Name	Habit	Height	Hardiness	Growth	Soil	Shade	Moisture	Edible	Medicinal	Other

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

Orontium aquaticum - L.