GENERAL INFORMATION
Scientific Name: Achillea hybrida
CommonName: Yarrow
Hardiness Zone: 5a - 8b
Hardiness Degree: -20°F (-20°C)
Blooming Season: Late Spring, Summer
Plant Habit: Upright
Characteristics: Deer Resistant, Drought Tolerant, Heat Tolerant
Water: Light
Fertilizer: Once a month
Spacing: 6 - 14" (15 - 36cm)
Height: 12 - 14" (30 - 36cm)
Width: 12 - 14" (30 - 36cm)
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: Not necessary, remove premature flowers.
Transplanting: 28-35 days after sticking
FINISHING
Media pH: 5.8-6.2
Temperature: Nights: 55 to 65°F (13 to 18°C) Days: 60 to 65°F (16 to 18°C)
Light Level (fc): 5,000 to 8,000
Vernalization: No
Daylength: Long day facultative
Watering: Allow media to dry regularly between watering.
Fertilization: Use a balanced fertilizer at a rate of 125 to 150 ppm.
Pinch After Transplant: Recommended
Plant Growth Regulators: PGRs generally not needed
Pests and Fungal Diseases: Pythium and rhizoctonia can result from overwatering.
CROP SCHEDULING
1–qt. (10–cm) pot, 1 plant per pot: Unrooted: 13-15 wks Rooted: 8-10 wks
1–gal. (15–cm) pot, 1 plant per pot: Unrooted: 15-17 wks Rooted: 10-12 wks
2 to 3–gal. (25 to 30–cm) pot, 3 plants per pot: Unrooted: 19-22 wks Rooted: 12-14 wks
Bloom Months: June to July