Helleborus Queens growing advice September - October
Dear Helleborus Queens® grower,
Unlike the summer growers the Helleborus hybrids get their energy from low temperatures. It is very important to keep the greenhouse temperatures low in the months from September till November.
The quality of the flowers and the growing rhythm will be disturbed when the temperature it too high in these months.
The second period will take place around the end of August. The plant has a strong root growth and is building up its reserves that are needed to develop the flower buds. In the fall, before the second growing period, the flower quality will be higher with the use of Kali and Epsom salts.
The Helleborus hybrids use a lot of water in the growing periods. This is because their big leaves evaporate a lot and because of their strong growing power. It is important that the plants can constantly take in enough water which they need for the evaporation. When the plant does not get enough water then the leaves will die prematurely.
Remove weeds, weeds are a nest of various problems!
False mildew is a disease that, in our experience, can cause the most damage. There should be sprayed preventive against it regularly in the months from April till October.
Strongly affected plants should always be removed to prevent from spreading. A good air circulation in the greenhouse is important.
Draught should be prevented at all times, strong wind will help the disease to spread. Spray against false mildew with Ortiva + Ridomil Gold.
- Flint: Gets partially included in the wax layer of the leaves
- Ortiva: Preventive and curative = systematic
- Switch: Preventive and curative
- Luna Privilege: Onwards systematic
Botrytis is a disease which appears at young plants in October and November. The young plants are creating lots of new foliage which are very vulnerable for this disease. To prevent this disease there should be sprayed two times in these months.
Lice can cause a lot of damage throughout the year. A good scouting is of importance here. Lice can be controlled with Admire or Confidor (Also works at low temperatures!).
Spider mites can cause problems in the warm summer months, control with Scelta or Floramite.
Caterpillars can cause damage above as well as under the ground, control with Turex or Decis.
Snails can cause damage above as well as under the ground.
Damage by the taxus beetle can be recognized by the round feeding tracks in the foliage. The most damage is actually being caused under the ground by larva eating on the roots.
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