Butterfly weed ( Asclepias tuberosa ) is a perennial plant native to Quebec, reaching 30 to 60 cm in height. It is distinguished by its bright orange flowers grouped in umbels, which appear from June to August.
2. Sowing
Difficulty level : Medium
Sowing Type : Indoors, 8 to 10 weeks before last frost (late February to early March in zone 5-6)
Sowing Technique : Seeds require cold stratification. Mix the seeds with a moist substrate (such as vermiculite or sand), place them in a sealed plastic bag, and refrigerate for 30 days. After stratification, sow the seeds on the surface, pressing them lightly into the potting soil without covering them, as they need light to germinate.
Sowing depth : On the surface
Germination days : 14 to 28 days
Germination temperature : 20 to 25C
3. Culture
Ease of cultivation : Average
Growing season : Spring to fall
Transplanting : After all risk of frost (end of May to beginning of June in zone 5-6)
Plant spacing : 30 to 45 cm between plants
Hardiness Zone : 3 to 9
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 : 2 to 3 years after sowing
Watering : Moderate, water during periods of prolonged drought
Other characteristics : Attracts butterflies, especially the monarch, and other pollinators. Ideal ornamental plant for naturalistic gardens and flower meadows.
4. Use
Perfect for landscaping, pollinator gardens, and native prairies, butterfly weed adds a vibrant splash of color and supports local biodiversity.
5. Companionship
Friendly plants : Asters, rudbeckias, echinaceas
Enemy plants : None known
This native plant is well adapted to Quebec’s climates and is an excellent choice for gardeners wishing to encourage pollinators and enrich their space with local species.
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