Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people.
Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition
Leaves - raw or cooked. The young shoots are eaten in the spring
Seed - cooked
. It is rather small and fiddly to utilize.
Tannin is obtained from the plant
. No more details, but it is likely to be from the root.
The whole plant, but especially the root, is astringent, depurative, skin
An infusion of the leaves and stems has been used to treat stomach pains and children with diarrhoea.
The root has been eaten raw, or an infusion of the dried, pounded roots used, in the treatment of chest colds
. A poultice of the fresh roots has been applied directly to the mouth to treat blisters
Seed - sow spring in a cold frame. Germination is usually free and easy. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer if they have reached sufficient size. If not, overwinter them in a cold frame and plant them out the following spring after the last expected frosts.
Division in spring or autumn. Very easy, larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.
Practical Plants is currently lacking information on propagation instructions of Polygonum amphibium. Help us fill in the blanks! Edit this page to add your knowledge.
A water or marsh plant growing in water up to 3 metres deep or in boggy soil
This species is hardy to about -25°c.
Plants seem to be immune to the predations of rabbits.
The leaves are often attacked by the larvae of the water-lily beetle.
Plants can either be aquatic with floating ovate-oblong leaf-blades or a leggy marsh plant with lanceolate leaves
. Their stems root at the nodes wherever they come into contact with the soil
Problems, pests & diseases
Associations & Interactions
There are no interactions listed for Polygonum amphibium. Do you know of an interaction that should be listed here? edit this page to add it.
Polycultures & Guilds
There are no polycultures listed which include Polygonum amphibium.
This table shows all the data stored for this plant.
Material uses & Functions
Native Climate Zones
Adapted Climate Zones
Native Geographical Range
Root Zone Tendancy
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