2009
Erysimum suffruticosum
"Gold Dust"
Flowering period: May - June
Height 25 - 50 cm
Spread: 25 - 50 cm
Habit: Spherical
Flower type: Semi-double
Leaf Color Light Green
Placement: Full sun to partial shade
Water Medium to low
Fertilizer need: Medium to low
Plant type: Perennial
Class Best seller 2009
ERYSIMUM SUFFRUTICOSUM, GOLDLACK 'Gold Dust'
Erysimum 'Gold Dust' is a fragrant winter annual/biennial with bright yellow flowers. 'Gold Dust' can be grown as a showy pot plant or used as a bedding plant. Temperature requirements are very similar to primula and pansy.
In northern climates it can be grown with early spring primulas and pansies. In the south Erysimum 'Gold Dust' can be grown and planted out like a fall pansy, wintered over, enjoyed in the spring-then pulled out when plants begin to fade in the heat.
TECHNICAL INFORMATION
Life Cycle: Perennial
Familiy, Origin: Brassicacae, South Europe
Sitelocation: Full sun - partial shade
Garden Height: 25 cm 9,84 inch
Natural flowertime: May - June
Crop Time: Plug crop: 4-6 weeks; Green pots: 10-12 weeks; Flowering pots: 14-16 weeks, annual production is possible; Flowering pots: 6-7 months, including wintering
Sell Period: March-April
Seed Form: Raw Seed
Seed Count: 600 K/g
Sowing Time: Februar-March for flowering in pots from May onwards; Outdoor forcing: August for flowering in pots from March onwards. Indoor forcing (frost free): September for flowering in pots from March onwards.
Sowing Method: 1 seed per plug
Germination: 6-12 days at 20-21 °C, in media with very low soluble salt levels and pH: 5.5-6.5. Cover seed lightly with vermiculite after sowing. Keep soil slightly moist but not wet.
Plug Culture: From Stage II* reduce the soil moisture, but the plug should not dry out and reduce the temperature to 15-18 °C. Do not let soluble salt level rise above 0,5 E.C. Start fertilization at 50 ppm nitrogen in a well balanced formula. During Stage III and Stage IV fertilization levels can be increased to 100-150 ppm.
Growing On: 3-4 weeks after sowing transplant 1 plant into a pot (9-12 cm).
Media: Use a well-drained, growing substrate with 10-30 % clay, 0-15 % parts (e.g. bark, sand, perlite), 1,5-3 kg/m³ complete balanced fertilizer, 0-2 kg/m³ slow release fertilizer (3-9 months), iron-chelate, micronutrients, pH: 5.5-6.5.
Photoperiod / Light: Day length neutral plants. In winter and early spring additional assimilation light is recommended in combination with warm cultivation temperatures at 15-18 °C. A cultivation in cold greenhouse or field at ambient conditions is possible. In this case the flowering is in March-May.
Temperature: Grow at 10-15 °C or outdoors. In winter indoors frost free at 3-5 °C or outdoors. Outdoor fleece cover needed. In early spring (from CW 51 on) the plants start to grow at 12-15 °C. Cold temperatures at 8-10 °C will increase the cultivation time (10-14 weeks in total). Temperatures below 8 °C increase the cultivation time at 4-6 weeks. A chilling period (vernalization) for flower initiation is not required, but cultivate as cold as possible. This will promote a good branching and a uniform flowering.
Fertilization: Moderate-high fertilization levels are required. Fertilize the crop weekly with 100-150 ppm nitrogen (at 2 kg/m³ slow release fertilizer in substrate), using a potassium balanced fertilizer (N: K2O-ratio: 1:1,5). Avoid high ammonium and high nitrogen levels. Don't fertilize after mid September. In spring fertilize 100-150 ppm nitrogen of a potassium balanced fertilizer.
Cultural Hints: After planting, before wintering and in spring treat the pots with fungicide against Botrytis. The roots are sensitive to wet substrates.Take care of a good drainage outdoors. Remove not the main shoot.
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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