GENERAL INFORMATION
Scientific Name: Achillea millefolium
CommonName: Yarrow
Hardiness Zone: 4a - 9a
Hardiness Degree: -30°F (-30°C)
Blooming Season: Late Spring, Summer, Autumn, Late Summer
Plant Habit: Mounded
Characteristics: Attracts Bees, Attracts Butterflies, Deer Resistant, Rabbit Resistant, Frost Tolerant
Water: Medium
Fertilizer: Once a month
Spacing: 14 - 16" (36 - 41cm)
Height: 10 - 12" (25 - 30cm)
Width: 10 - 12" (25 - 30cm)
Exposure: Sun
PROPAGATION
Media EC/pH: EC 1.0-1.25 mmhos/pH 5.8-6.2
Soil Temperature: 70-72°F (21-22°C)
Rooting Hormone: 500-1,000 ppm IBA
Mist: Low to moderate
Fertilization: 50-75 ppm N
Pinching: Pinch to remove flower buds.
Transplanting: 35-42 days after sticking
FINISHING
Media pH: 5.8-6.2
Temperature: Nights: 55 to 65°F (13 to 18°C) Days: 65 to 75°F (18 to 24°C)
Light Level (fc): 2,500 to 4,500
Vernalization: No
Daylength: Long day facultative
Watering: Moderate
Fertilization: Use a balanced fertilizer at a rate of 150 to 175 ppm N.
Pinch After Transplant: Typically not required
Plant Growth Regulators: PGRs generally not needed
Pests and Fungal Diseases: Aphids on the buds
CROP SCHEDULING
1–qt. (10–cm) pot, 1 plant per pot: Rooted: 6 wks
1–gal. (15–cm) pot, 1 plant per pot: Rooted: 6-8 wks
2 to 3–gal. (25 to 30–cm) pot, 3 plants per pot: Not recommended
Bloom Months: April to September