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Summary

Physical Characteristics

Nasturtium microphyllum is a PERENNIAL growing to 0.5 m (1ft 8in) by 1 m (3ft 3in).
See above for USDA hardiness. It is hardy to UK zone 6 and is not frost tender. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies. The plant is self-fertile.
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: Leaves Seed
Edible Uses: Condiment

Leaves - raw or cooked[2, 5, 7, 9, 16, 27]. Exceptionally rich in vitamins and minerals, especially iron[200]. The leaves are mainly used as a garnish or as an addition to salads, the flavour is strong with a characteristic hotness[183]. The seed can be sprouted and eaten in salads[183]. A hot flavour. The seed is ground into a powder and used as a mustard[46, 183]. The pungency of mustard develops when cold water is added to the ground-up seed - an enzyme (myrosin) acts on a glycoside (sinigrin) to produce a sulphur compound. The reaction takes 10 - 15 minutes. Mixing with hot water or vinegar, or adding salt, inhibits the enzyme and produces a mild but bitter mustard[238].

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.
Antiscorbutic Diuretic Expectorant Purgative Stimulant Stomachic

Antiscorbutic, diuretic, expectorant, purgative, stimulant, stomachic[4, 9, 21, 46]. Use with caution[21].

References More on Medicinal Uses

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Other Uses

None known

Special Uses

References More on Other Uses

Cultivation details

Watercress is easily grown when given the correct conditions of slowly flowing clean water, preferably coming from chalky or limestone soils[264]. It prefers to grow in water about 5cm deep[37] with an optimum pH 7.2[200]. Plants can be grown in wet soil if the position is somewhat shaded and protection is given in winter, though the flavour may be hotter[27, 37]. Plants are hardy to about -15°c[200], they tolerate somewhat lower temperatures than the closely related N. officinale[200]. Watercress is often cultivated for its edible leaves, there are some named varieties[16, 183]. The plant is very sensitive to pollution so a clean source of water is required[200]. Plants will often continue to grow all through mild winters. A fast-growing plant, the stems trail along the ground or float in water and produce new roots at the leaf nodes, thus making the plant very easy to propagate vegetatively[238]. Unfortunately, virus diseases have become more common in cultivated plants and so most propagation is carried out by seed[264]. This is a triploid species. It has hybridised naturally in the wild with the diploid species N. officinale to produce the sterile hybrid N. x sterilis which is also commonly cultivated as a salad crop[264]. The flowers are a rich source of pollen and so are very attractive to bees[7].

References Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Propagation

Seed - sow spring in a pot emmersed to half its depth in water. Germination should take place within a couple of weeks. Prick out seedlings into individual pots whilst they are still small and increase the depth of water gradually until they are submerged. Plant out into a pond in the summer. Cuttings can be taken at any time in the growing season. Virtually any part of the plant, including a single leaf, will form roots if detached from the parent plant[56]. Just put it in a container of water until the roots are well formed and then plant out in shallow water.

Other Names

If available other names are mentioned here

Native Plant Search

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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
Nasturtium officinale	Watercress	Perennial	0.5	3-11	F	LMH	N	WeWa	4	3	2
Nasturtium x sterile	Brown Watercress	Perennial	0.5	5-9		LMH	N	WeWa	4	3	1
Tropaeolum majus	Nasturtium, Indian Cress	Perennial Climber	3.5	8-11	F	LM	N	M	4	3	3
Tropaeolum minus	Dwarf Nasturtium	Perennial	0.3	8-11		LM	N	M	4	3	2

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.

Nasturtium microphyllum - Boenn. ex Rchb.