AIPH unveils updated version of its Green City Guidelines The International Association of Horticultural Producers (AIPH) has unveiled an updated version of its Green City Guidelines documentation. by Dan Symonds Almere in the Netherlands is one of the case studies to feature in the Green City Guidelines - credit: Pixabay Sign in to continue Keep track of competitors, market trends, and policy changes with sector specific email bulletins Live email alerts from New project leads and business prospects every week through the landscape leads service