Significance of this study
What is already known on this subject?
• It was previously demonstrated that PBZ is effective
in controlling plant height and enhancing colour of a
large number of floriculture crops. However, different
species have their own needs as to way of application
(spray or substrate drench) and appropriate
dosage.
What are the new findings?
• The study showed that PBZ as a substrate drench
reduces plant height and enhances foliage colour in
potted Dianthus barbatus × chinensis, a species at
present cultivated as a cut flower. Appropriate dosage
ranges from 0.5 to 1 mg a.i. per pot depending on
pot size, cultivar and season.
What is the expected impact on horticulture?
• The ornamental plant market is characterized by
being eager for novelties. Therefore, the use of
Dianthus barbatus × chinensis as a new flowering pot
crop, which is made possible by height control, may
represent an opportunity for growers.