Vegetative Variety

Iberis Summer Snowdrift

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Data is gathered from our West Grove, Pa., trials (Zone 6a). Southern growers: expect 1-2 weeks earlier finishing. Northern growers: 1 week slower. Consider summertime scheduling accurate. Dates based on a standard 72 liner size.

Week color desired
URC stick week
Liner transplant week
(1 ppp)
*URC typically arrive with flower buds due to cool nights in Colombia. If not, cuttings require 6 weeks of night temperatures below 55F to flower.
Week color desired
URC stick week
Liner transplant week
(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: 500 ppm IBA
Mist: Low to moderate
Fertilization: 50-75 ppm N when roots become visible
Pinching: Recommended after roots are established. Leave active internodes.
Transplanting: 28-35 days after sticking
Comments: Use low mist settings; do not oversaturate rooting media. Root zone temperatures of 70°F (21°C). Remove flowers in propagation. Cuttings typically arrive with flowers already induced due to cool night temperatures in Colombia. Non-induced cuttings require 6 weeks of night temperatures below 55°F (13°C) to flower.
Finishing Guide
Media pH: 5.8-6.2
Temperature: Nights: 45 to 55°F (7 to 13°C) Days: 55 to 65°F (13 to 18°C)
Light Level (fc): 3,000 to 5,000
Vernalization: Cuttings supplied from Darwin Colombia receive enough cold to induce into flower, so growers will not need to vernalize.
Daylength: Day length neutral
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: May experience root rot diseases under poor growing conditions. Aphids.