The propagation process is started in the Boereboom Invitro Cultures laboratory in the Netherlands, to produce the desired number of plants for an order. After this start, the tissue culture material is produced in Portugal at Boereboom Invitro Portugal scaled up to the desired number. The entire production process for an order takes about six months and takes place in this laboratory.
When the plants are rooted at tissue culture stage Stage 3, they are transferred to the Netherlands. At a fellow propagation company, these plants are transplanted and placed on paper plugs. After rooting, the plants are hardened off, making them suitable as starting material for further cultivation.
For plugs suitable for direct planting in the open field, the plants are further grown in a cabrio-greenhouse for six weeks. After that, the plugs are ready for planting out. In spring, after transplanting, a technical cut is carried out so that the plants can grow into a straight tree.
At the nursery at van Oploo Garden Plants the plugs are potted in spring. Here, the plants grow further, develop a solid root system and form healthy cuttings above ground. In autumn, the plants are cleaned and stored in a cold store. The following spring, the plants are removed from the cold store and pruned back. They are then ready for planting out in the open ground, where they grow into trees about 8-10 metres tall.
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