スターチス・シヌアータの挿し芽苗による促成栽培

With the aim of preventing devernalization of statice (Limonium sinuatum Mill.) during summer in order to force the production of cut flowers harvestable from autumn, plants of cvs. 'La Mer' and 'Sunday Pink' were propagated by cuttings in late spring to late summer. Flowering stock plants were cut back thoroughtly, and after 15 days newly emerged vegetative buds were divided individually and rooted under intermittent mist. The rooted cuttings were planted in plastic pots and raised for 30 days followed by transplanting into wooden containers (36×60×D 18cm), 5 plants a container. During the two month's period after propagation, all emerging flower stalks were removed to allow a vigorous vegetative growth of plants. Plants propagated on 16 May, 15 June and 15 July, produced cut flowers starting from October, unlike those that were propagated on 14 August which did not flower until December. However, cut flowers of higher quality were mainly obtained from those plants that were propagated on 15 July. In addition, when the young propagated on 15 July were raised in the open field and under trees or in a cool house system, starting from October they produced more cut flowers that were of even higher quality than those raised in a plastic house. Only the plants that received water stress treatment during the potting stage flowered from November. There, from this forcing culture using cutting plants, marketable cut flowers of statice can be obtained from October without the usual requirement of low/cool temperature treatment.