Canadian goldenrod
Solidago canadensis · Asteraceae
📷 Georg Slickers · CC BY-SA 4.0
The gardener's calendar
Canadian goldenrod is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Plant type
- Perennial herb
- Family
- Asteraceae
- Foliage
- Deciduous
- Flowering
- August to October
- Adult height
- Approximately 100 cm
- Hardiness
- Very hardy (zone 3-9)
- Origin
- North America
- Growth
- Fast
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Plant in full sun in almost any soil—this is a very hardy, prolific bloomer. Water moderately while establishing, then it'll manage on its own.
The common mistake
Giving it too much space: it spreads via rhizomes and will take over everything.
The pro's trick
Cut stems to ground level in November-December: the clump will regrow more compact come spring.
Seasonal watch
August-September: it blooms right when other plants fade, but in extreme drought, flowers will be fewer and sparser.
Care
Exposure
Canadian goldenrod appreciates full sun exposure to flower generously. It tolerates partial shade but produces fewer flowers and a less robust plant. Install it in a well-open location, away from root competition from large trees.
Watering
Water regularly during the first season to establish a good root system. Once established, goldenrod tolerates drought well thanks to its deep roots. In poor or very draining soil, maintain moderate watering during growth.
Soil and location
This plant adapts to most soils, even poor or chalky ones. It dislikes overly wet or poorly drained soils that risk promoting root rot. Light, well-drained soil suits it perfectly.
Pruning and cutting
Cut back faded stems in late autumn or early spring to maintain shape and prepare for the new season. Cutting back to 15-20 cm from the soil in late winter promotes a bushier plant. Remove spent flowers if you wish to prevent invasive self-seeding.
Fertilizer
Canadian goldenrod requires no specific fertilizer, even in poor soil. An application of compost or organic matter in spring is sufficient to support flowering. Avoid excess nitrogen which would excessively prolong vegetative growth.
Pests and diseases
Goldenrod is generally very healthy and rarely subject to attacks. In very humid conditions, watch for powdery mildew or rust: improve air circulation and avoid watering the foliage. Mites can occasionally appear in case of prolonged drought.
Did you know?
Canadian goldenrod, despite its poor reputation in Europe where it's accused of promoting allergies, is actually a scapegoat: it's ragweed that causes respiratory allergies, not goldenrod whose pollen is too heavy to fly through the air. In North America, where the plant is native, it has been valued for centuries by Indigenous peoples for its traditional diuretic properties.
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
- WormwoodArtemisia absinthium
- Dyer's chamomileCota tinctoria
Tips generated and checked by Viridia — adapt them to your local climate.