Vegetative Variety

Delphinium Red Lark

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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
TC stick week
Liner transplant week
Spring/Summer
 
Gallon
(1 ppp)
 
 
 
 
Long day facultative. Will flower faster early in the season using long day lighting. Southern growers and high light regions can finish Red Lark in 12-14 weeks. 50 plug or larger liners will finish a little faster.
Week color desired
TC stick week
Liner transplant week
Late-Summer/Fall
 
Gallon
(1 ppp)
 
 
 
 
Propagation Guide
Media EC/pH: 5.8-6.2
Temperature: 68-72°F (21-22°C)
Rooting Hormone: None
Mist: Low mist or tenting
Fertilization: Balanced fertilizer 75-100 ppm
Pinching: None
Transplanting: 42-49 days
Comments: This is a tissue culture raised item. Please see our detailed tissue culture propagation guide at darwinperennials.com.
Finishing Guide
Media pH: 5.8-6.2
Temperature: Nights: 55 to 60°F (13 to 16°C) Days: 60 to 70°F (16 to 21°C)
Light: 5,000 to 8,000
Vernalization: No
Daylength: Long day facultative
Watering: Allow media to dry moderately between watering.
Fertilization: Use a balanced fertilizer at a rate of 150 to 175 ppm N.
Pinch After Transplant: None
Plant Growth Regulators: PGRs generally not needed
Pests and Fungal Diseases: Watch for typical pests, such as thrips, white fly, spider mites and aphids.