The dyer’s coreopsis ( Coreopsis tinctoria ) is an annual plant native to Quebec, reaching between 30 and 90 cm in height. It produces an abundance of yellow flowers with reddish-brown centers, measuring about 2 to 3 cm in diameter, from June to September.
2. Sowing
- Difficulty level : Easy
- Type of sowing : Direct in open ground in spring, after the last frost (end of May in zone 5-6)
- Sowing technique : Sow the seeds on the surface, without covering them, as they require light to germinate.
- Sowing depth : On the surface
- Germination days : 10 to 15 days
- Germination temperature : 18 to 24C
3. Culture
- Ease of cultivation : Easy
- Growing season : Spring to fall
- Transplanting : Not necessary, prefers direct sowing
- Plant spacing : 20 to 30 cm between plants
- Hardiness Zone : Annual, not hardy
- Brightness : Full sun
- Soil Type : Dry to moderately moist, well-drained soils
- Soil pH : Neutral to slightly acidic
- Soil Moisture : Drought tolerant once established
- Soil fertility : Not very demanding
- Time before flowering : 6 to 8 weeks after sowing
- Watering : Moderate, water during periods of prolonged drought
- Other characteristics : Attracts pollinators, including bees and butterflies. The flowers can be used for natural dyeing, producing shades of yellow and orange.
4. Use
Ideal for naturalistic gardens, flower meadows, and borders, the dyer’s coreopsis adds a vibrant splash of color throughout the summer. The flowers are also prized for natural dyeing.
5. Companionship
- Friendly plants : Asters, rudbeckias, echinaceas
- Enemy plants : None known
This native annual plant is well adapted to Quebec’s climates and is an excellent choice for gardeners wishing to enrich their space with colorful flowers and support local biodiversity.
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