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L8770 - ERYNGIUM PLANUM, FLAT SEA HOLLY
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'Eryngium planum'
Cornflower-blue flower heads.
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TECHNICAL INFORMATION |
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| Life Cycle: | |
Perennial
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| Familiy, Origin: | |
Apiaceae, Mediterranean, Mountains Europe
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| Sitelocation: | |
Full sun
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| Garden Height: | |
120 cm
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47,24 inch
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| Natural flowertime: | |
July - September
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| Crop Time: | |
Plug crop: 6-8 weeks; Green pots: 16 weeks; Flowering pots: 10-12 months, including vernalization; Cut flower production: 5-7 years
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| Sell Period: | |
April-October
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| Seed Form: | |
Raw Seed
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| Seed Count: | |
714 K/g
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| Sowing Time: | |
November-March for green pots
July-September for flowering in pots the following year
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| Sowing Method: | |
4-5 seeds per plug
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| Germination: | |
14-20 days at 18-24 °C, in media with very low soluble salt levels and pH: 6.0-7.5. Cover seed with vermiculite, sand or substrate after sowing. Keep soil slightly moist but not wet. When the seeds do not germinate, treat the seeds with cooling for 4-6 weeks at 0-4 °C. Cultivate in the following week at 10°C and later at temperature of 18-20 °C.
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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 18-20 °C. Do not let soluble salt level rise above 0,75 EC. Start fertilization at 50-75 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: | |
6-9 weeks after sowing transplant 1 plant into a pot (8-10 cm, pot type: 12-14 cm). Plant cut flowers (frost free) in 30x40 cm space or transplant 3-4 plants into a container (25-40 l). For cut flower production cultivate in container in order to simplify culture control because of the container's mobility.
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| Media: | |
Use a well-drained, growing perennial substrate with 0-20 % clay, 0-15 % parts (e.g. wood fibres, bark, perlite, sand), 1-1,5 kg/m³ complete balanced fertilizer, 0-3 kg/m³ slow release fertilizer (3-9 months), iron-chelate, micronutrients, pH: 6.0-7.5. Field: humus, sandy loamy soils with good drainage. Standard fertilization: 60-80 g/m² slow release fertilizer.
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| Photoperiod / Light: | |
Long day plant. Keep light level high.
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| Temperature: | |
Grow at 15-18 °C or outdoors. In winter indoors frost free at 3-5 °C or outdoors. Outdoor fleece cover needed. In spring the plants start to grow at 12-18 °C or outdoors at ambient conditions. To control the cut flower production in container. The containers can be stored in cold storage at -1 °C and set up in intervals for forcing afterwards.
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| Fertilization: | |
High fertilization levels are required. Fertilize the crop weekly with 150-200 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 100-150 ppm nitrogen of a complete balanced fertilizer. Prevent magnesium deficiency by applying magnesium sulphate (0,05 %) 1-2 times and in case of iron deficiency (above pH 6.0) apply iron-chelate for 1-2 times. Field: If necessary according to analysis, improve the soil with 60-80 g/m² of a slow release fertilizer, applied in several portions.
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| Cut Flowers: | |
Cut flower stems can be harvested, when the flowers are just half open. Remove the soft lateral shoots. Vase life: 12-16 days. Cold storage is possible. The stems can be harvested for dried flowers, when the flowers are fully open.
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| Cultural Hints: | |
Cut flower production outdoors can be controlled by planting in intervals or mowing the plant partly in summer. The flowering starts, depending on season, after 100-150 days. The plant shape improves after a chilling period with respect to uniformity and better quality. Eryngium are very sensitive to wetness.
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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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