Triglochin palustris
Triglochin palustris · Juncaginaceae
The gardener's calendar
Ideal time to plant triglochin palustris: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Summer (June to August)
- Adult size
- 20 to 60 cm in height
- Growth
- Slow to moderate
- Hardiness
- Very hardy (zone 2-9)
- Origin
- Wetlands of Europe, Asia and North America
- Soil type
- Moist to waterlogged
- Natural habitat
- Marshes, wet meadows, peatlands
Care
Watering and humidity
Arrowgrass requires constant moisture: the soil should never dry out completely. Install it at the edge of a pond or in a regularly flooded area. Regular watering is essential, particularly during the spring and summer growing season.
Light exposure
Choose a sunny to partially shaded location for optimal growth. This plant tolerates full sun exposure well if soil moisture is maintained. It can also adapt to partially shaded areas in moist environments.
Soil composition
Requiring constantly moist to waterlogged soil, arrowgrass thrives in peaty, loamy or sandy substrates rich in organic matter. Avoid overly compacted soils; improve with peat or compost for aquatic herbaceous plants.
Fertilization
This plant from naturally poor environments needs little fertilizer. A moderate application in spring is sufficient; prefer diluted fertilizer or allow natural decomposition to enrich the soil. Avoid overfeeding, which would promote eutrophication.
Pruning and cleanup
No pruning is necessary. Simply remove dead leaves in late winter and faded flower heads after blooming. This naturally slender herbaceous plant maintains itself very autonomously.
Diseases and pests
Very robust in its natural environment, arrowgrass is rarely affected. Rot can occur if the soil becomes temporarily too anoxic; promote aeration. Few pests threaten it under suitable conditions.
Did you know?
Arrowgrass is a pioneer plant of wetlands that plays a major ecological role: its roots stabilize loose soils and its fruits contained in multi-seeded capsules disperse by water, rapidly colonizing new flooded areas. Its Latin name Triglochin literally means 'three points', referring to the shape of its carpels.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Sea arrowgrassTriglochin maritima
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- Pedunculate oakQuercus robur
- CamelliaCamellia japonica
- GrapevineVitis vinifera
- SageSalvia officinalis
Tips generated and checked by Viridia — adapt them to your local climate.