Common & small-fruited yellow-sedge
Carex oederi · Cyperaceae
The gardener's calendar
Ideal time to plant common & small-fruited yellow-sedge: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Cyperaceae (Carex)
- Foliage
- Evergreen, light green to yellow-green
- Flowering
- Late summer to autumn (July–October)
- Mature size
- 30–40 cm tall, compact clumping habit
- Growth rate
- Slow to moderate
- Hardiness
- Very hardy (down to -20°C)
- Origin
- Europe, temperate damp and montane zones
- Soil type
- Moist to wet, tolerant, poor to rich
Care
Watering
Late sedge thrives in damp environments and dislikes prolonged drying out. Keep the soil moist or even wet, especially during the growing season. In dry continental climates, regular watering in summer is beneficial. Reduce slightly in winter.
Light
Plant your sedge in full sun to partial shade. It tolerates partial shade well in warm regions. Very shaded areas will slow its growth, but it survives without difficulty.
Soil and drainage
This carex accepts all soil types, from sandy to loamy, provided it stays fresh or moist. It thrives in boggy, peaty, or waterside soils. Drainage improvement is only necessary if the soil remains constantly waterlogged in winter.
Pruning and tidying
Comb or lightly mow in late winter (February–March) to remove dead and discoloured foliage. This sedge doesn't require rigorous pruning; simple rejuvenation is enough to stimulate spring growth.
Feeding
Fertiliser is generally unnecessary for this undemanding species. In very poor soil or after several years, a light balanced feed in spring can boost foliage vigour.
Pests and diseases
Late sedge is robust and rarely troubled by disease. Root rot occurs only if soil remains excessively waterlogged in winter without aeration. General foliage decline signals abnormal drought or poor drainage.
Did you know?
Late sedge owes its scientific name 'oederi' to Danish botanist Georg Christian Oeder (18th century), whose pioneering work on Nordic flora laid the foundations for Carex taxonomy. Once overlooked, it is returning to favour in ecological management of urban and rural wetlands, where it plays a key role in stabilising banks and acts as a natural filter.
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
- Blue sedgeCarex panicea
- Spring sedgeCarex caryophyllea
- Pendulous sedgeCarex pendula
- Bird's-foot SedgeCarex ornithopoda
- Gray's sedgeCarex grayi
- Strict sedgeCarex stricta
Tips generated and checked by Viridia — adapt them to your local climate.