THE YEARROUND CULTURE OF TOMATOES ON ROCKWOOL IN THE NETHERLANDS
The main reasons why growers change their systems of interplanting, can be described as follows:
- There are no more peaks of labour in comparison with interplanting.
- The production of tomatoes is higher in the period of May to July.
- Throughout the year the quality of the fruits is better as compared with interplanting.
It is clear that the high wire with a higher production in the period May to July leads to a much more favourable price level, because the prices in spring are at a higher level.
The high wire system implies that you will grow one tomato plant from December until November. That's why the glasshouse must be high enough, otherwise the fruits will reach the ground. The height for round tomatoes must be 3.25 mtr. and for beef tomatoes 2.50 mtr. All the work is done on specially developed cars on a tube rail system. Every fortnight the plants are lowered with special high wire hooks. On the hooks there are fibres with a length of 9 mtr. for round tomatoes and 6 mtr. for beef tomatoes.