Flat-topped goldenrod
Euthamia graminifolia · Asteraceae
Euthamia graminifolia is a perennial herbaceous plant native to North American wetlands. This graceful golden rod offers abundant small golden-yellow flowers from August to October, making it an excellent choice for late-season color in the garden. With its fine, linear foliage and compact growth habit, it brings an airy, natural aesthetic to borders and mixed plantings. Very hardy and low-maintenance, it thrives in sunny to partly shaded locations and prefers consistently moist but well-drained soil.
The gardener's calendar
Ideal time to plant flat-topped goldenrod: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Euthamia graminifolia
- Family
- Asteraceae
- Plant type
- Perennial herbaceous
- Mature height
- 60 to 90 cm
- Flowering period
- August to October, golden-yellow flowers
- Foliage
- Deciduous, fine and linear
- Hardiness
- Very hardy, -25°C
- Origin
- North America (wetland zones)
Care
Light Requirements
Plant your grass-leaved goldenrod in full sun or partial shade for optimal flowering. It tolerates light shade but will flower less abundantly. Aim for at least 4 to 5 hours of direct daily sunlight to ensure good vigor and abundant blooms.
Watering
Water regularly during spring and summer, especially during dry spells. This plant appreciates moist soil but dreads waterlogging. In autumn and winter, reduce watering. A light mulch helps maintain soil moisture.
Soil
Prefer rich, well-drained, and slightly moist soil. Grass-leaved goldenrod tolerates a wide range of pH levels and adapts to ordinary soils enriched with organic matter. Avoid overly compacted or very dry soils.
Pruning and Maintenance
Cut the plant back to 10 cm from the ground in late winter or early spring before growth resumes. You can also pinch young shoots in May-June to encourage a bushier form and better branching.
Fertilization
Apply balanced fertilizer in spring when growth begins. An annual application of well-decomposed compost is generally sufficient. Avoid excess nitrogen, which promotes foliage at the expense of flowering.
Health and Pests
Grass-leaved goldenrod is a robust plant, seldom affected by disease. Occasionally watch for aphids during warm periods and powdery mildew if air circulation is poor. Good air circulation and basic garden hygiene prevent most problems.
Did you know?
Grass-leaved goldenrod was long wrongly blamed for causing autumn hay fever and pollen allergies in North America, when ragweed is actually the true culprit. This misunderstanding nearly caused this beautiful plant to disappear from gardens! Today, botanists and allergologists have set the record straight: goldenrod pollen is heavy and sticky, transported by insects rather than wind.
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
- SunflowerHelianthus annuus
- YarrowAchillea millefolium
- Ox-eye daisyLeucanthemum vulgare
- SneezewortAchillea ptarmica
- Canadian goldenrodSolidago canadensis
- WormwoodArtemisia absinthium
Tips generated and checked by Viridia — adapt them to your local climate.