All speakers must submit a manuscript for the Acta Horticulturae. Authors of posters are welcome to submit their manuscript for Acta Horticulturae but posters cannot be published as such. Acta Horticulturae is a peer reviewed series, covering mainly the proceedings of ISHS Symposia and the International Horticultural Congress. All Acta Horticulturae articles are available online at http://www.actahort.org/. Papers should be prepared following the Acta Horticulturae author guidelines and must be submitted prior to 1th October.