Marram grass
Calamagrostis arenaria · Poaceae
The gardener's calendar
Ideal time to plant marram grass: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous to semi-evergreen, grey-green
- Flowering
- July to September, silvery spikelets
- Mature size
- 0.6 to 1.2 m in height
- Growth rate
- Fast
- Hardiness
- Approximately -20 °C
- Origin
- Atlantic and Mediterranean coasts of Europe
- Soil type
- Sandy, well-drained, poor
- Exposure
- Full sun
Care
Exposure
Plant marram grass in full sun, ideally in a wind-exposed location. It thrives on coastal areas and tolerates salt spray extremely well. Avoid shaded areas where its growth would be slowed.
Soil and drainage
This grass prefers sandy, light and well-drained soils, even very poor ones. It adapts remarkably to the difficult conditions of coastal dunes. No rich organic matter needs to be added.
Watering
Once established, marram grass is very tolerant of drought. Water moderately when planting to facilitate root establishment. In coastal regions, it makes do with natural rainfall; in more continental climates, occasional watering during hot spells is sufficient.
Pruning and maintenance
Cut back the grass in late winter or early spring, before growth resumes, to 10-15 cm from the ground. This cutting stimulates foliage density and rejuvenates the plant. You can leave the flower spikes in place in autumn for ornamental interest.
Fertilization
No fertilizer is needed. This plant is adapted to poor soils and excess nutrients would weaken its hardiness and balance. A very light compost at planting time is sufficient.
Health and pests
Marram grass is very resistant to diseases and pests. Its adaptation to difficult coastal environments gives it natural robustness. Simply ensure good drainage to prevent any root rot in case of prolonged water stagnation.
Did you know?
Marram grass is one of the rare plants capable of stabilizing coastal dunes: its deep and branching roots trap sand grains, forming true natural barriers against erosion. Historically, it was deliberately planted along French Atlantic coasts to protect agricultural land and homes from maritime storms.
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
- Tufted hair grassDeschampsia cespitosa
- Wavy hair-grassAvenella flexuosa
- Purple moor-grassMolinia caerulea
- Reed canary-grassPhalaris arundinacea
- Common quaking grassBriza media
- Creeping soft-grassHolcus mollis
Tips generated and checked by Viridia — adapt them to your local climate.