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K3630 - DELPHINIUM GRANDIFLORUM, CHINESE DELPHINIUM, LARKSPUR
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'Summer Stars'
profusely branching genetically compact dwarf larkspur with masses of flowers in attractive colers. The 'Summer' series is earlier to flower with better heat tolerance than other delphiniums of this type. All colors do not require vernalisation and can be grown as annuals. Ideal bedding or in gardeniers.
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TECHNICAL INFORMATION |
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| Life Cycle: | |
Perennial / first year flowering
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| Familiy, Origin: | |
Ranunculaceae, China, East Siberia
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| Sitelocation: | |
Full sun - partial shade
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| Garden Height: | |
30 cm
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11,81 inch
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| Flower Size: | |
3,5 cm
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1,38 inch
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| Natural flowertime: | |
June - September
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| Crop Time: | |
Plug crop: 6 weeks; Green pots: 12-14 weeks; Flowering pots (from sowing to flower): 16-20 weeks (annual cultivation); Flowering pots: 8-10 months, including wintering and vernalization
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| Sell Period: | |
April-May or August-October
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| Seed Form: | |
Raw Seed
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| Seed Count: | |
800 K/g
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| Sowing Time: | |
Annual forcing: December-May; Perennial forcing: Mid August-Mid September including wintering
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| Sowing Method: | |
2-3 seeds per plug
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| Germination: | |
Stage I: 14-18 days at 20-22 °C; Stage II: 15-20 days at 17-20 °C, Stage III+IV: 20-25 days at 13-17 °C in media with low soluble salt levels and pH: 5.8-6.5. Cover seed lightly with vermiculite or sand after sowing. Keep soil slightly moist but not wet.
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| Plug Culture: | |
From Stage II reduce the soil moisture, but the plug should not dry out.
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| Growing On: | |
6-9 weeks after sowing transplant 1 plant into a pot (9-10 cm) and 3 plants into a bigger pot (13-15 cm). Transplant the plant not too deep in substrate.
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| Media: | |
Use a well-drained, growing substrate, pH: 5.8-6.5.
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| Photoperiod / Light: | |
Day length neutral plant. Flowerings pot production in winter and spring with additional assimilation light combined with long day (14 h) will improve the plant quality and will decrease the cultivation time by 2-3 weeks.
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| Temperature: | |
Grow at 13-16 °C or outdoors. In winter indoors frost free at 3-5 °C or outdoors. Outdoor fleece cover and dry substrate needed. In spring the plants start to grow for 8-10 weeks at 15-20 °C. Temperatures below 13 °C in combined with short day is a cause for rosette leaf formation and inhibition of the flower initiation.
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| Fertilization: | |
Moderate fertilization levels are required
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| Cultural Hints: | |
Dry, light and airy cultivation. Keep a good ventilation between the plants.
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All colors
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* Germination Stages (from seed to finished young plant)
| Stage I: | Starts with the radicle breaking through the testa. The roots are touching the medium. Ends with fully developed cotyledons. |
| Stage II: | Starts from fully developed cotyledons. Ends with the fully developed true leaf or true leaf pair. |
| Stage III: | Starts from the fully developed true leaf or true leaf pair and ends with 80% of the young plants being marketable. |
| Stage IV: | All young plants are ready for sale and in the process of being hardened off. This stage lasts about 7 days. |
Hint
The cultural recommendations are based on results from trials conducted under Central European conditions. Different conditions in other parts of the world may lead to deviations in results achieved.
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