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First-Year-Flowering Scheduling Tool

Heliopsis helianthoides Sunstruck
North: grown outdoor flowering window weeks 24-35
South: grown outdoor flowering window weeks 24-35
Spring-summer programs
Week color desired
URC stick week  
Liner ready week  
Liner transplant week  
Heliopsis is a long-day plant. Growing outdoors it will be difficult to get into flower before week 24.
Heliopsis helianthoides Sunstruck
Suggested Container Size.
Container: 2.5 qt (1 ppp)
Propagation Guide
Media EC/pH: EC 0.75-0.80 mmhos/pH 5.8-6.2
Soil Temperature: 70-72°F (21-22°C)
Rooting Hormone: 1,000 ppm IBA
Mist: Low
Fertilization: 50-75 ppm N when roots become visible
Pinching: Recommended after roots are established. Leave 4-5 active internodes.
Transplanting: Liner transplant week
Comments: Use low mist settings; do not oversaturate rooting media. Root zone temperatures of 70°F (21°C). Remove flowers in propagation. Long day obligate plant. Must provide long days in propagation.
Finishing Guide
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): 5,000 to 8,000
Vernalization: Beneficial; aids in bulking.
Daylength: long day obligate
Watering: Allow media to dry slightly between watering.
Fertilization: Use a balanced fertilizer at a rate of 150 to 175 ppm.
Pinch After Transplant: Recommended
Plant Growth Regulators: PGRs generally not needed
Pests and Fungal Diseases: Pythium and rhizoctonia can result from overwatering. Thrips, white fly, aphids.