Common Name: Blackjack, Spanish Needle 5 Short Germination Tips for Bidens pilosa: No Dormancy Treatment Needed – Seeds germinate easily without stratification or scarification. Surface Sowing – Lightly press seeds onto the soil surface without covering them, as they need light to germinate. Well-Draining Soil – Use a sandy or loamy seed-starting mix to prevent excess moisture and root rot. Consistent Moisture – Keep the soil evenly moist but not waterlogged to encourage sprouting. Warmth Speeds Germination – Maintain temperatures between 20–30°C (68–86°F) for best results.