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U8330 - ROSA CHINENSIS, CHINA ROSE
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'Angel Rose'
Improved white and pink selection with double, semi-double and single flowers. Easy to grow from seed with flowers 5 to 6 months.
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TECHNICAL INFORMATION |
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| Life Cycle: | |
Perennial
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| Familiy, Origin: | |
Rosaceae, Europe
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| Sitelocation: | |
Full sun - partial shade
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| Garden Height: | |
40 cm
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15,75 inch
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| Natural flowertime: | |
June - October
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| Crop Time: | |
Plug crop: 6-8 weeks; Green pots: 10-13 weeks; Flowering pots: 20 weeks, annual production is possible; Flowering pots: 24-32 weeks, including wintering
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| Seed Form: | |
Raw Seed
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| Seed Count: | |
179 K/g
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| Sowing Time: | |
All-season for flowering in pots; June-August for flowering in pots the following year
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| Sowing Method: | |
3-5 seeds per plug, can be sown directly into pots
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| Germination: | |
20-30 days at 18-20 °C, in media with very low soluble salt levels and pH: 5.5-6.5. Before sowing treat substrate with fungicide against Botrytis. Cover seed with vermiculite, sand or substrate after sowing. Keep soil moist but not wet. Take good care of a high relative humidity.
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| Plug Culture: | |
From Stage II* reduce the soil moisture, but the plug should not dry out and reduce the temperature to 16 °C. Supplemental lighting one week after sowing is recommended for a good plant development. Do not let soluble salt level rise above 0,5 EC. Start fertilization at 50 ppm nitrogen in a well balanced formula. During Stage III and Stage IV fertilization levels can be increased to 150-200 ppm.
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| Growing On: | |
4-6 weeks after sowing transplant 3-5 plants into a pot (6-12 cm) or packs. After transplantation treat substrate with fungicide against Botrytis.
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| Media: | |
Use a well-drained, growing substrate with 15-30 % clay, 0-15 % parts (e.g. wood fibres, perlite), 1-2 kg/m³ complete balanced fertilizer, 0-3 kg/m³ slow release fertilizer (3-9 months), iron-chelate, micronutrients, pH: 5.5-6.5.
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| Photoperiod / Light: | |
Day length neutral plants. Keep light level high. High light intensity improves the vegetative growth and the flower initiation. Start with additional assimilation light one week after sowing. The long day (16 h) with additional assimilation light decreases the cultivation time. A dark period of at least 4 h is required. In winter and in early spring additional assimilation light (at least 4500 lx, optimal 6000-10000 lx) is required. Light deficiency can be a cause that the buds dry quickly.
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| Temperature: | |
Grow at 17-20 °C. during vegetative growth avoid temperatures below 14 °C. Low temperature are a cause for a delayed flower initiation and the development of shoots without any flower. In winter indoors frost free at 3-5 °C. In spring the plants start to grow for 6-8 weeks at 18-20 °C. Constant day and night temperatures will promote the shoot development and the flower quantity. For flower initiation a chilling period (vernalization) is not required. Plants can be stored at 5 °C for selling.
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| Fertilization: | |
High fertilization levels are required. Fertilize the crop weekly with 200-250 ppm nitrogen (at 3 kg/m³ slow release fertilizer in substrate), using a complete balanced fertilizer. Avoid high ammonium and high nitrogen levels. Don't fertilize after mid September. In spring fertilize 200-300 ppm nitrogen of a complete balanced fertilizer. Prevent magnesium deficiency by applying magnesium sulphate (0,025 %) 1-2 times and in case of iron deficiency apply iron-chelate for 1-2 times. The CO2 fertilization (1000 vpm) stimulates the growth in winter and in spring.
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| Cultural Hints: | |
Take good care of a constant water supply. Once the substrate is dried out, defects from yellow leaves to dropped off leaves will occur. Avoid over watering and over head irrigation. Pinching the tops twice promote a good branching and a good compact plant habit, but will increase the cultivation time.
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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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