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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